Derby cycle Pedelec Impulse Evo RS Speed User manual

BICYCLE OWNER’S MANUAL
| 11th Edition, 2015
ORIGINAL USER MANUAL PEDELEC IMPULSE EVO RS SPEED
| Version 1 | 04.2015
SERVICE BOOKLET
| 04.2015
English
Pedelec Impulse Evo RS Speed

2 Bicycle Owner’s Manual | Pedelec Impulse Evo RS Speed Version 1
IMPORTANT:
This manual contains important safety, performance and service
information. Read it completely before you take the rst ride on your new
bicycle, and keep it for reference.
Additional safety, performance and service information for specic
components such as suspension or pedals on your bicycle, or for
accessories such as helmets or lights that you purchase, may also be
available. Make sure that your dealer has given you all the manufacturers’
literature that was included with your bicycle or accessories. In case
of a conict between the instructions in this manual and information
provided by a component manufacturer, always follow the component
manufacturer’s instructions. You must also read the bpsa manual delivered
with this bike.
If you purchased a pedelec, please carefully read the complete original
user manual of the pedelec too!
If you have any questions or do not understand something, take
responsibility for your safety and consult with your dealer or the bicycle’s
manufacturer.
NOTE:
This manual is not intended as a comprehensive use, service, repair or
maintenance manual. Please see your dealer for all service, repairs or
maintenance. Your dealer may also be able to refer you to classes, clinics or
books on bicycle use, service, repair or maintenance.
This manual is not intended as a guide to learn how to ride a bicycle or a
pedelec.
Bicycle Owner’s Manual
11th Edition, 2015
This manual meets ISO-4210, 16 CFR 1512 and EN 14764,
14766 and 14781 Standards

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4. Tech
A. Wheels p. 18
1. secondary retention devices p. 19
2. Wheels with cam action systems p. 19
3. Removing and installing wheels p. 20
B. Seat post cam action clamp p. 23
C. Brakes p. 24
D. Shiing gears p. 25
E. Pedals p. 28
F. Bicycle Suspension p. 29
G. Tires and Tubes p. 30
5. Service
A. Service Intervals p. 32
B. If your bicycle sustains an impact p. 33
Appendix A: Intended Use p. 34
Appendix B: Lifespan of your bike and its components p. 40
Appendix C: Coaster Brakes p. 46
Appendix D: Fastener Torque Specications p. 46
Contents
GENERAL WARNING p. 4
A special note to parents p. 5
1. First
A. Bike t p. 6
B. Safety rst p. 6
C. Mechanical Safety Check p. 7
D. First ride p. 8
2. Safety
A. The Basics p. 9
B. Riding Safety p. 10
C. O Road Safety p. 11
D. Wet Weather Riding p. 11
E. Night Riding p. 11
F. Extreme, stunt or competition riding p. 13
G. Changing Components or Adding Accessories p. 13
3. Fit
A. Standover height p. 14
B. Saddle position p. 15
C. Handlebar height and angle p. 16
D. Control position adjustments p. 17
E. Brake reach p. 17

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Many of the Warnings and Cautions say “you may lose control and fall”.
Because any fall can result in serious injury or even death, we do not
always repeat the warning of possible injury or death.
Because it is impossible to anticipate every situation or condition which
can occur while riding, this Manual makes no representation about the
safe use of the bicycle under all conditions. There are risks associated with
the use of any bicycle which cannot be predicted or avoided, and which
are the sole responsibility of the rider.
GENERAL WARNING:
Like any sport, bicycling involves risk of injury and damage. By
choosing to ride a bicycle, you assume the responsibility for that risk, so
you need to know — and to practice — the rules of safe and responsible
riding and of proper use and maintenance. Proper use and maintenance of
your bicycle reduces risk of injury.
This Manual contains many “Warnings” and “Cautions” concerning the
consequences of failure to maintain or inspect your bicycle and of failure
to follow safe cycling practices.
• The combination of the safety alert symbol and the word WARNING
indicates a potentially hazardous situation which, if not avoided, could
result in serious injury or death.
• The combination of the safety alert symbol and the word CAUTION
indicates a potentially hazardous situation which, if not avoided, may
result in minor or moderate injury, or is an alert against unsafe practices.
• The word CAUTION used without the safety alert symbol indicates a
situation which, if not avoided, could result in serious damage to the
bicycle or the voiding of your warranty.

Bicycle Owner’s Manual | Pedelec Impulse Evo RS Speed Version 1 5
A special note for parents:
WARNING: This manual does not cover children's bikes, Juvenile or
BMX bicycles.
As a parent or guardian, you are responsible for the activities and safety of
your minor child, and that includes making sure that the bicycle is properly
tted to the child; that it is in good repair and safe operating condition; that
you and your child have learned and understand the safe operation of the
bicycle; and that you and your child have learned, understood and obeyed
not only the applicable local motor vehicle, bicycle and trac laws, but also
the common sense rules of safe and responsible bicycling. As a parent, you
should read this manual, as well as review its warnings and the bicycle’s
functions and operating procedures with your child, before letting your child
ride the bicycle.
WARNING: Make sure that your child always wears an approved
bicycle helmet when riding; but also make sure that your child
understands that a bicycle helmet is for bicycling only, and must be
removed when not riding. A helmet must not be worn while playing, in play
areas, on playground equipment, while climbing trees, or at any time while
not riding a bicycle. Failure to follow this warning could result in serious
injury or death.

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B. Safety rst
1. Always wear an approved and correct tting helmet when riding your
bike, and follow the helmet manufacturer’s instructions for t, use and
care.
2. Do you have all the other required and recommended safety
equipment? See Section 2. It’s your responsibility to familiarize yourself
with the laws of the areas where you ride, and to comply with all
applicable laws.
3. Do you know how to correctly secure your front and rear wheels?
Check Section 4.A.1 to make sure. Riding with an improperly secured
wheel can cause the wheel to wobble or disengage from the bicycle, and
cause serious injury or death.
4. If your bike has toeclips and straps or clipless (“step-in”) pedals,
make sure you know how they work (see Section 4.E). These pedals
require special techniques and skills. Follow the pedal manufacturer’s
instructions for use, adjustment and care.
5. Do you have “toe overlap”? On smaller framed bicycles your toe or
toeclip may be able to contact the front wheel when a pedal is all the way
forward and the wheel is turned. Read Section 4.E. to check whether you
have toeclip overlap.
6. Does your bike have suspension? If so, check Section 4.F. Suspension
can change the way a bicycle performs. Follow the suspension
manufacturer’s instructions for use, adjustment and care.
1. First
NOTE: We strongly urge you to read this manual in its entirety before your
rst ride. At the very least, read and make sure that you understand each
point in this section, and refer to the cited sections on any issue which
you don’t completely understand. Please note that not all bicycles have all
of the features described in this manual. Ask your dealer to point out the
features of your bicycle.
A. Bike t
1. Is your bike the right size? To check, see Section 3.A. If your bicycle
is too large or too small for you, you may lose control and fall. If your new
bike is not the right size, ask your dealer to exchange it before you ride it.
2. Is the saddle at the right height? To check, see Section 3.B. If you
adjust your saddle height, follow the Minimum Insertion instructions in
Section 3.B.
3. Are saddle and seat post securely clamped? A correctly tightened
saddle will allow no saddle movement in any direction. See Section 3.B.
4. Are the stem and handlebars at the right height for you? If not, see
Section 3.C.
5. Can you comfortably operate the brakes? If not, you may be able to
adjust their angle and reach. See Section 3.D and 3.E.
6. Do you fully understand how to operate your new bicycle? If not,
before your rst ride, have your dealer explain any functions or features
which you do not understand.

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tightening force can result in component failure, which can cause
you to loose control and fall.
▸ Make sure nothing is loose. Lift the front wheel o the ground by two
or three inches, then let it bounce on the ground. Anything sound, feel or
look loose? Do a visual and tactile inspection of the whole bike. Any loose
parts or accessories? If so, secure them. If you’re not sure, don`t start the
ride. First ask someone with experience to check.
▸ Tires & Wheels: Make sure tires are correctly inated (see Section
4.G.1). Check by putting one hand on the saddle, one on the intersection
of the handlebars and stem, then bouncing your weight on the bike while
looking at tire deection. Compare what you see with how it looks when
you know the tires are correctly inated; and adjust if necessary.
▸ Tires in good shape? Spin each wheel slowly and look for cuts in the
tread and sidewall. Replace damaged tires before riding the bike.
▸ Wheels true? Spin each wheel and check for brake clearance and
side-to-side wobble. If a wheel wobbles side to side even slightly, or rubs
against or hits the brake pads, take the bike to a qualied bike shop to
have the wheel trued.
CAUTION: Wheels must be true for rim brakes to work eectively.
Wheel trueing is a skill which requires special tools and experience.
Do not attempt to true a wheel unless you have the knowledge,
experience and tools needed to do the job correctly.
▸ Wheel rims clean and undamaged? Make sure the rims are clean and
undamaged at the tire bead and, if you have rim brakes, along the braking
surface. Check to make sure that any rim wear indicator marking is not or
still visible at any point on the wheel rim depending on the type of wear
indicator used on your bike.
C. Mechanical Safety Check
Routinely check the condition of your bicycle before every ride.
▸ Nuts, bolts screws & other fasteners: Because manufacturers use a
wide variety of fastener sizes and shapes made in a variety of materials,
often diering by model and component, the correct tightening force
or torque cannot be generalized. To make sure that the many fasteners
on your bicycle are correctly tightened, refer to the Fastener Torque
Specications in Appendix D of this manual or to the torque specications
in the instructions provided by the manufacturer of the component in
question. Correctly tightening a fastener requires a calibrated torque
wrench. A professional bicycle mechanic with a torque wrench should
torque the fasteners on you bicycle. If you choose to work on your own
bicycle, you must use a torque wrench and the correct tightening torque
specications from the bicycle or component manufacturer or from your
dealer. If you need to make an adjustment at home or in the eld, we urge
you to exercise care, and to have the fasteners you worked on checked by
your dealer as soon as possible. Note that there are some components which
require special tools and knowledge. In Sections 3 and 4 we discuss the items
which you may be able to adjust yourself. All other adjustments and repairs
should be done by a qualied bicycle mechanic.
WARNING: Check all fasteners and quick releases for correct and safe
function, even if the bike was left unattended just for a short period
of time!
WARNING: Correct tightening force on fasteners –nuts, bolts,
screws– on your bicycle is important. Too little force, and the
fastener may not hold securely. Too much force, and the fastener can
strip threads, stretch, deform or break. Either way, incorrect

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twist them.
WARNING: Loose or damaged handlebar grips or extensions can cause
you to lose control and fall. Unplugged handlebars or extensions can
cut you and cause serious injury in an otherwise minor accident.
VERY IMPORTANT SAFETY NOTE:
Please also read and become thoroughly familiar with the important in-
formation on the lifespan of your bicycle and its components in Appendix B
on Page 28.
D. First ride
When you buckle on your helmet and go for your rst familiarization ride
on your new bicycle, be sure to pick a controlled environment, away from
cars, other cyclists, obstacles or other hazards. Ride to become familiar
with the controls, features and performance of your new bike.
Familiarize yourself with the braking action of the bike (see Section
4.C). Make yourself familiar which levers activates which brake, right/left,
front/rear. Test the brakes at slow speed, putting your weight toward the
rear and gently applying the brakes, rear brake rst. Sudden or excessive
application of the front brake could pitch you over the handlebars.
Applying brakes too hard can lock up a wheel, which could cause you to
lose control and fall. Skidding is an example of what can happen when a
wheel locks up.
If your bicycle has toeclips or clipless pedals, practice getting in and out
of the pedals. See paragraph B.4 above and Section 4.E.4.
If your bike has suspension, familiarize yourself with how the
WARNING: Bicycle wheel rims are subject to wear. Ask your dealer
about wheel rim wear. Some wheel rims have a rim wear indicator
which becomes visible or disappears as the rim’s braking surface
wears. A visible rim wear indicator on the side of the wheel rim is an
indication that the wheel rim has reached its maximum usable life. Riding a
wheel that is at the end of its usable life can result in wheel failure, which
can cause you to loose control and fall.
▸ Brakes: Check the brakes for proper operation (see Section 4.C).
Squeeze the brake levers. Are the brake quick-releases closed? All control
cables seated and securely engaged? If you have rim brakes, do the brake
pads contact the wheel rim squarely and make full contact with the rim?
Do the brakes begin to engage within an inch of brake lever movement?
Can you apply full braking force at the levers without having them touch
the handlebar? If not, your brakes need adjustment. Do not ride the bike
until the brakes are properly adjusted by a professional bicycle mechanic.
▸ Wheel retention system: Make sure the front and rear wheels are
correctly secured. See Section 4.A
▸ Seat post: If your seat post has an over-center cam action fastener
for easy height adjustment, check that it is properly adjusted and in the
locked position. See Section 4.B.
▸ Handlebar and saddle alignment: Make sure the saddle and handlebar
stem are parallel to the bike’s center line and clamped tight enough so that
you can’t twist them out of alignment. See Sections 3.B and 3.C.
▸ Handlebar ends: Make sure the handlebar grips are secure and in good
condition, with no cuts, tears, or worn out areas. If not, have your dealer
replace them. Make sure the handlebar ends and extensions are plugged.
If not, have your dealer plug them before you ride. If the handlebars have
bar end extensions, make sure they are clamped tight enough so you can’t

Bicycle Owner’s Manual | Pedelec Impulse Evo RS Speed Version 1 9
WARNING: Failure to wear a helmet when riding may result in serious
injury or death.
2. Always do the Mechanical Safety Check (Section 1.C) before you get
on a bike.
3. Be thoroughly familiar with the controls of your bicycle: brakes
(Section 4.C.); pedals (Section 4.E.); shifting (Section 4.D.)
4. Be careful to keep body parts and other objects away from the sharp
teeth of chainrings, the moving chain, the turning pedals and cranks, and
the spinning wheels of your bicycle.
5. Always wear:
• Shoes that will stay on your feet and will grip the pedals. Make sure
that shoe laces cannot get into moving parts, and never ride barefoot or in
sandals.
• Bright, visible clothing that is not so loose that it can be tangled in the
bicycle or snagged by objects at the side of the road or trail.
• Protective eyewear, to protect against airborne dirt, dust and bugs —
tinted when the sun is bright, clear when it’s not.
6. Unless your bicycle was specically designed for jumping (See
Appendix A, Intended Use) don’t jump with your bike. Jumping a bike,
particularly a BMX or mountain bike, can be fun; but it can put huge and
unpredictable stress on the bicycle and its components. Riders who insist
on jumping their bikes risk serious damage, to their bicycles as well as to
themselves. Before you attempt to jump, do stunt riding or race with your
bike, read and understand Section 2.F.
7. Ride at a speed appropriate for conditions. Higher speed means
higher risk.
suspension responds to brake application and rider weight shifts. See
paragraph B.6 above and Section 4.F.
Practice shifting the gears (see Section 4.D). Remember to never move
the shifter while pedaling backward, nor pedal backwards immediately
after having moved the shifter. This could jam the chain and cause serious
damage to the bicycle.
Check out the handling and response of the bike; and check the comfort.
If you have any questions, or if you feel anything about the bike is not as
it should be, consult your dealer before you ride again.
2. Safety
A. The Basics
WARNING: The area in which you ride may require specic safety devices.
It is your responsibility to familiarize yourself with the laws of the area
where you ride and to comply with all applicable laws, including properly
equipping yourself and your bike as the law requires.
Observe all local bicycle laws and regulations. Observe regulations about
bicycle lighting, licensing of bicycles, riding on sidewalks, laws regulating
bike path and trail use, helmet laws, child carrier laws, special bicycle
trac laws. It’s your responsibility to know and obey the laws.
1. Always wear a cycling helmet which meets the latest certication
standards and is appropriate for the type of riding you do. Always follow
the helmet manufacturer’s instructions for t, use and care of your helmet.
Most serious bicycle injuries involve head injuries which might have been
avoided if the rider had worn an appropriate helmet.

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7. Use approved hand signals for turning and stopping.
8. Never ride with headphones. They mask trac sounds and emergency
vehicle sirens, distract you from concentrating on what’s going on around
you, and their wires can tangle in the moving parts of the bicycle, causing
you to lose control.
9. Never carry a passenger; and, before installing a child carrier or
trailer, check with your dealer or the bicycle manufacturer to make sure
the bicycle is designed for it. If the bicycle is suitable for a child carrier or
trailer, make sure that the carrier or trailer is correctly mounted and the
child is secured and wearing an approved helmet.
10. Never carry anything which obstructs your vision or your complete
control of the bicycle, or which could become entangled in the moving
parts of the bicycle.
11. Never hitch a ride by holding on to another vehicle.
12. Don’t do stunts, wheelies or jumps. If you intend to do stunts,
wheelies, jumps or go racing with your bike despite our advice not to, read
Section 2.F, Downhill, Stunt or Competition Biking, now. Think carefully
about your skills before deciding to take the large risks that go with this
kind of riding.
13. Don’t weave through trac or make any moves that may surprise
people with whom you are sharing the road.
14. Observe and yield the right of way.
15. Never ride your bicycle while under the inuence of alcohol or drugs.
16. If possible, avoid riding in bad weather, when visibility is obscured,
at dawn, dusk or in the dark, or when extremely tired. Each of these
conditions increases the risk of accident.
B. Riding Safety
1. Obey all Rules of the Road and all local trac laws.
2. You are sharing the road or the path with others — motorists,
pedestrians and other cyclists. Respect their rights.
3. Ride defensively. Always assume that others do not see you.
4. Look ahead, and be ready to avoid:
• Vehicles slowing or turning, entering the road or your lane ahead of
you, or coming up behind you.
• Parked car doors opening.
• Pedestrians stepping out.
• Children or pets playing near the road.
• Pot holes, sewer grating, railroad tracks, expansion joints, road or
sidewalk construction, debris and other obstructions that could cause
you to swerve into trac, catch your wheel or cause you to have an
accident.
• The many other hazards and distractions which can occur on a bicycle
ride.
5. Ride in designated bike lanes, on designated bike paths or as close
to the edge of the road as possible, in the direction of trac ow or as
directed by local governing laws.
6. Stop at stop signs and trac lights; slow down and look both ways at
street intersections. Remember that a bicycle always loses in a collision
with a motor vehicle, so be prepared to yield even if you have the right of
way.

Bicycle Owner’s Manual | Pedelec Impulse Evo RS Speed Version 1 11
O Road respect
Obey the local laws regulating where and how you can ride o-road, and
respect private property. You may be sharing the trail with others — hikers,
equestrians, other cyclists. Respect their rights. Stay on the designated
trail. Don’t contribute to erosion by riding in mud or with unnecessary
sliding. Don’t disturb the ecosystem by cutting your own trail or shortcut
through vegetation or streams. It is your responsibility to minimize your
impact on the environment. Leave things as you found them; and always
take out everything you brought in.
D. Wet Weather Riding
WARNING: Wet weather impairs traction, braking and visibility, both
for the bicyclist and for other vehicles sharing the road. The risk of an
accident is dramatically increased in wet conditions.
Under wet conditions, the stopping power of your brakes (as well as the
brakes of other vehicles sharing the road) is dramatically reduced and
your tires don’t grip nearly as well. This makes it harder to control speed
and easier to lose control. To make sure that you can slow down and stop
safely in wet conditions, ride more slowly and apply your brakes earlier
and more gradually than you would under normal, dry conditions.See also
Section 4.C.
E. Night Riding
Riding a bicycle at night is much more dangerous than riding during
the day. A bicyclist is very dicult for motorists and pedestrians to see.
Therefore, children should never ride at dawn, at dusk or at night. Adults
C. O Road Safety
We recommend that children do not ride on rough terrain unless they are
accompanied by an adult.
1. The variable conditions and hazards of o-road riding require close
attention and specic skills. Start slowly on easier terrain and build up
your skills. If your bike has suspension, the increased speed you may
develop also increases your risk of losing control and falling. Get to know
how to handle your bike safely before trying increased speed or more
dicult terrain.
2. Wear safety gear like a helmet and protectors appropriate to the kind
of riding you plan to do.
3. Don’t ride alone in remote areas. Even when riding with others, make
sure that someone knows where you’re going and when you expect to be
back.
4. Always take along some kind of identication, so that people know
who you are in case of an accident; and take along some cash for food, a
cool drink or an emergency phone call.
5. Yield right of way to pedestrians and animals. Ride in a way that does
not frighten or endanger them, and give them enough room so that their
unexpected moves don’t endanger you.
6. Be prepared. If something goes wrong while you’re riding o-road,
help may not be close.
7. Before you attempt to jump, do stunt riding or race with your bike,
read and understand Section 2.F.

12 Bicycle Owner’s Manual | Pedelec Impulse Evo RS Speed Version 1
following strongly recommended additional precautions:
• Purchase and install battery or generator powered head and tail lights
which meet all regulatory requirements for where you live and provide
adequate visibility.
• Wear light colored, reective clothing and accessories, such as a
reective vest, reective arm and leg bands, reective stripes on your
helmet, ashing lights attached to your body and/or your bicycle ... any
reective device or light source that moves will help you get the attention
of approaching motorists, pedestrians and other trac.
• Make sure your clothing or anything you may be carrying on the bicycle
does not obstruct a reector or light.
• Make sure that your bicycle is equipped with correctly positioned and
securely mounted reectors.
While riding at dawn, at dusk or at night:
• Ride slowly.
• Avoid dark areas and areas of heavy or fast-moving trac.
• Avoid road hazards.
• If possible, ride on familiar routes.
If riding in trac:
• Be predictable. Ride so that drivers can see you and predict your
movements.
• Be alert. Ride defensively and expect the unexpected.
• If you plan to ride in trac often, ask your dealer about trac safety
classes or a good book on bicycle trac safety.
who chose to accept the greatly increased risk of riding at dawn, at dusk
or at night need to take extra care both riding and choosing specialized
equipment which helps reduce that risk. Consult your dealer about night
riding safety equipment.
WARNING: Reectors are not a substitute for required lights. Riding
at dawn, at dusk, at night or at other times of poor visibility without
an adequate bicycle lighting system and without reectors is
dangerous and may result in serious injury or death.
Bicycle reectors are designed to pick up and reect car lights and street
lights in a way that may help you to be seen and recognized as a moving
bicyclist.
CAUTION: Check reectors and their mounting brackets regularly to
make sure that they are clean, straight, unbroken and securely
mounted. Have your dealer replace damaged reectors and straighten
or tighten any that are bent or loose.
The mounting brackets of front and rear reectors are often designed as
brake straddle cable safety catches which prevent the straddle cable from
catching on the tire tread if the cable jumps out of its yoke or breaks.
WARNING: Do not remove the front or rear reectors or reector
brackets from your bicycle. They are an integral part of the bicycle’s
safety system. Removing the reectors reduces your visibility to
others using the roadway. Being struck by other vehicles may result in
serious injury or death. The reector brackets may protect you from a
brake straddle cable catching on the tire in the event of brake cable failure.
If a brake straddle cable catches on the tire, it can cause the wheel to stop
suddenly, causing you to loose control and fall.
If you choose to ride under conditions of poor visibility, check and
be sure you comply with all local laws about night riding, and take the

Bicycle Owner’s Manual | Pedelec Impulse Evo RS Speed Version 1 13
WARNING: Bicycles and bicycle parts have limitations with regard to
strength and integrity, and this type of riding can exceed those
limitations or dramatically reduce the length of their safe use.
We recommend against this type of riding because of the increased
risks; but if you choose to take the risk, at least:
• Take lessons from a competent instructor rst
• Start with easy learning exercises and slowly develop your skills before
trying more dicult or dangerous riding
• Use only designated areas for stunts, jumping, racing or fast downhill
riding
• Wear a full face helmet, safety pads and other safety gear
• Understand and recognize that the stresses imposed on your bike by
this kind of activity may break or damage parts of the bicycle and void the
warranty
• Take your bicycle to your dealer if anything breaks or bends. Do not
ride your bicycle when any part is damaged.
If you ride downhill at speed, do stunt riding or ride in competition,
know the limits of your skill and experience. Ultimately, avoiding injury is
your responsibility.
G. Changing Components or Adding Accessories
There are many components and accessories available to enhance the
comfort, performance and appearance of your bicycle. However, if you
change components or add accessories, you do so at your own risk. The
F. Extreme, stunt or competition riding
Whether you call it Aggro, Hucking, Freeride, North Shore, Downhill,
Jumping, Stunt Riding, Racing or something else: if you engage in this sort
of extreme, aggressive riding you will get hurt, and you voluntarily assume
a greatly increased risk of injury or death.
Not all bicycles are designed for these types of riding, and those that
are may not be suitable for all types of aggressive riding. Check with your
dealer or the bicycle’s manufacturer about the suitability of your bicycle
before engaging in extreme riding.
When riding fast down hill, you can reach speeds achieved by
motorcycles, and therefore face similar hazards and risks. Have your
bicycle and equipment carefully inspected by a qualied mechanic and
be sure it is in perfect condition. Consult with expert riders, area site
personnel and race ocials on conditions and equipment advisable at the
site where you plan to ride. Wear appropriate safety gear, including an
approved full face helmet, full nger gloves, and body armor. Ultimately,
it is your responsibility to have proper equipment and to be familiar with
course conditions.
WARNING: Although many catalogs, advertisements and articles
about bicycling depict riders engaged in extreme riding, this activity
is extremely dangerous, increases your risk of injury or death, and
increases the severity of any injury. Remember that the action depicted is
being performed by professionals with many years of training and
experience. Know your limits and always wear a helmet and other
appropriate safety gear. Even with state-of-the-art protective safety gear,
you could be seriously injured or killed when jumping, stunt riding, riding
downhill at speed or in competition.

14 Bicycle Owner’s Manual | Pedelec Impulse Evo RS Speed Version 1
WARNING: If your bicycle does not t properly, you may lose control
and fall. If your new bike doesn’t t, ask your dealer to exchange it
before you ride it.
A. Standover height
1. Diamond frame bicycles
Standover height is the basic element of bike t (see ). It is the distance
from the ground to the top of the bicycle’s frame at that point where your
crotch is when straddling the bike. To check for correct standover height,
straddle the bike while wearing the kind of shoes in which you’ll be riding,
and bounce vigorously on your heels. If your crotch touches the frame, the
bike is too big for you. Don’t even ride the bike around the block. A bike
which you ride only on paved surfaces and never take o-road should give
you a minimum standover height clearance of two inches (5 cm). A bike
that you’ll ride on unpaved surfaces should give you a minimum of three
inches (7.5 cm) of standover height clearance. And a bike that you’ll use
o road should give you four inches (10 cm) or more of clearance.
2. Step-through frame bicycles
Standover height does not apply to bicycles with step-through frames.
Instead, the limiting dimension is determined by saddle height range.
You must be able to adjust your saddle position as described in B without
exceeding the limits set by the height of the top of the seat tube and the
”Minimum Insertion” or “Maximum Extension” mark on the seat post.
bicycle’s manufacturer may not have tested that component or accessory
for compatibility, reliability or safety on your bicycle. Before installing any
component or accessory, including but not limited to a dierent size tire, a
lighting system, a luggage rack, a child seat, a trailer, etc., make sure that
it is compatible with your bicycle by checking with your dealer. Be sure to
read, understand and follow the instructions that accompany the products
you purchase for your bicycle. See also Appendix A, p. 24 and B, p. 28.
WARNING: Failure to conrm compatibility, properly install, operate
and maintain any component or accessory can result in serious injury
or death.
WARNING: Exposed springs on the saddle of any bicycle tted with a
child seat can cause serious injury to the child. Cover all springs of the
saddle and the seatpost to avoid that the child can get hurt.
WARNING: Changing the components on your bike with other than
genuine replacement parts may compromise the safety of your bicycle
and may void the warranty. Check with your dealer before changing the
components on your bike.
3. Fit
NOTE: Correct t is an essential element of bicycling safety, performance
and comfort. Making the adjustments to your bicycle which result in correct
t for your body and riding conditions requires experience, skill and
special tools. Always have your dealer make the adjustments on your
bicycle; or, if you have the experience, skill and tools, have your dealer
check your work before riding.

Bicycle Owner’s Manual | Pedelec Impulse Evo RS Speed Version 1 15
manufacturer’s instructions).
Once the saddle is at the correct height, make sure that the seat post
does not project from the frame beyond its “Minimum Insertion” or
“Maximum Extension” mark (g. 4).
NOTE: Some bicycles have a sight hole in the seat tube, the purpose of
which is to make it easy to see whether the seat post is inserted in the
seat tube far enough to be safe. If your bicycle has such a sight hole, use
it instead of the “Minimum Insertion” or “Maximum Extension” mark
to make sure the seat post is inserted in the seat tube far enough to be
visible through the sight hole.
If your bike has an interrupted seat tube, as is the case on some
suspension bikes, you must also make sure that the seat post is far enough
into the frame so that you can touch it through the bottom of the
interrupted seat tube with the tip of your nger without inserting your
nger beyond its rst knuckle. In case of an interupted seat tube you must
take care, that the seat post never touches the suspension element or
another part of the frame, no matter how much the suspension element is
compressed!
Also see NOTE above and g. 5.
WARNING: If your seat post is not inserted in
the seat tube as described in B.1 above, the
seat post, binder or even frame may break,
which could cause you to lose control and fall.
2. Front and back adjustment. The saddle can
be adjusted forward or back to help you get the
optimal position on the bike. Ask your dealer to
set the saddle for your optimal riding position and to show you how to
make this adjustment. If you choose to make your own front and back
B. Saddle position
Correct saddle adjustment is an important factor in getting the most
performance and comfort from your bicycle. If the saddle position is not
comfortable for you, see your dealer.
The saddle can be adjusted in three directions:
1. Up and down adjustment.
To check for correct saddle height (g. 3):
• sit on the saddle;
• place one heel on a pedal;
• rotate the crank until the pedal with your
heel on it is in the down position and the
crank arm is vertical.
If your leg is not completely straight, your saddle height needs to be
adjusted. If your hips must rock for the heel to reach the pedal, the saddle
is too high. If your leg is bent at the knee with your heel on the pedal, the
saddle is too low.
Ask your dealer to set the saddle for your optimal riding position and to
show you how to make this adjustment.
If you choose to make your own saddle height adjustment:
▸ loosen the seat post clamp
▸ raise or lower the seat post in the seat tube
▸ make sure the saddle is straight fore and aft
▸ re-tighten the seat post clamp to the
recommended torque (Appendix D or the

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WARNING: After any saddle adjustment, be sure that the saddle
adjusting mechanism is properly seated and tightened before riding. A
loose saddle clamp or seat post clamp can cause damage to the seat
post, or can cause you to lose control and fall. A correctly tightened saddle
adjusting mechanism will allow no saddle movement in any direction.
Periodically check to make sure that the saddle adjusting mechanism is
properly tightened.
If, in spite of carefully adjusting the saddle height, tilt and fore-and-aft
position, your saddle is still uncomfortable, you may need a dierent
saddle design. Saddles, like people, come in many dierent shapes, sizes
and resilience. Your dealer can help you select a saddle which, when
correctly adjusted for your body and riding style, will be comfortable.
WARNING: Some people have claimed that extended riding with a
saddle which is incorrectly adjusted or which
does not support your pelvic area correctly can
cause short-term or long-term injury to nerves and
blood vessels, or even impotence. If your saddle
causes you pain, numbness or other discomfort,
listen to your body and stop riding until you see
your dealer about saddle adjustment or a dierent
saddle.
C. Handlebar height and angle
Your bike is equipped either with a “threadless” stem, which clamps
on to the outside of the fork shaft, or with a “quill” stem, which clamps
inside the steerer tube by way of an expanding binder bolt. If you aren’t
absolutely sure which type of stem your bike has, ask your dealer.
If your bike has a “threadless” stem (g. 6) your dealer may be able to
change handlebar height by moving height adjustment spacers from below
adjustment, make sure that the clamp mechanism is clamping on the
straight part of the saddle rails and is not touching the curved part of the
rails, and that you are using the recommended torque on the clamping
fastener(s) (Appendix D or the manufacturer’s instructions).
3. Saddle angle adjustment. Most people prefer a horizontal saddle;
but some riders like the saddle nose angled up or down just a little. Your
dealer can adjust saddle angle or teach you how to do it. If you choose
to make your own saddle angle adjustment and you have a single bolt
saddle clamp on your seat post, it is critical that you loosen the clamp bolt
suciently to allow any serrations on the mechanism to disengage before
changing the saddle’s angle, and then that the serrations fully re-engage
before you tighten the clamp bolt to the recommended torque (Appendix D
or the manufacturer’s instructions).
WARNING: When making saddle angle adjustments with a single bolt
saddle clamp, always check to make sure that the serrations on the
mating surfaces of the clamp are not worn. Worn serrations on the
clamp can allow the saddle to move, causing you to lose control and
fall.
Always tighten fasteners to the correct torque. Bolts that are too tight
can stretch and deform. Bolts that are too loose can move and fatigue.
Either mistake can lead to a sudden failure of the bolt, causing you to lose
control and fall.
Note: If your bicycle is equipped with a suspension seat post, the
suspension mechanism may require periodic service or maintenance. Ask
your dealer for recommended service intervals for your suspension seat
post.
Small changes in saddle position can have a substantial eect on
performance and comfort. To nd your best saddle position, make only one
adjustment at a time.

Bicycle Owner’s Manual | Pedelec Impulse Evo RS Speed Version 1 17
steering action, which could cause you to lose control and fall. Place the
front wheel of the bicycle between your legs and attempt to twist the
handlebar/stem assembly. If you can twist the stem in relation to the front
wheel, turn the handlebars in relation to the stem, or turn the bar end
extensions in relation to the handlebar, the bolts are insuciently
tightened.
WARNING: Be aware that adding aerodynamic extensions to
handlebars will change the steering and braking response of the
bicycle.
D. Control position adjustments
The angle of the brake and shift control levers and their position on
the handlebars can be changed. Ask your dealer to make the adjustments
for you. If you choose to make your own control lever angle adjustment,
be sure to re-tighten the clamp fasteners to the recommended torque
(Appendix D or the manufacturer’s instructions).
E. Brake reach
Many bikes have brake levers which can be adjusted for reach. If you
have small hands or nd it dicult to squeeze the brake levers, your
dealer can either adjust the reach or t shorter reach brake levers.
WARNING: The shorter the brake lever reach, the more critical it is to
have correctly adjusted brakes, so that full braking power can be
applied within available brake lever travel. Make shure, that the brake
levers never touches the handlebar or the grips, no matter how hard you
pull them. Brake lever travel insucient to apply full braking power can
result in loss of control, which may result in serious injury or death.
the stem to above the stem, or vice versa. Otherwise, you’ll have to get a
stem of dierent length or rise. Consult your dealer. Do not attempt to do
this yourself, as it requires special knowledge.
If your bike has a “quill amped mark on its shaft which designates the
stem’s “Minimum Insertion” or “Maximum Extension”. This mark must not
be visible above the headset.
WARNING: A quill stem’s Minimum Insertion Mark must not be visible
above the top of the headset. If the stem is extended beyond the
Minimum Insertion Mark the stem may break or damage the fork’s
steerer tube, which could cause you to lose control and fall.
WARNING: On some bicycles, changing the stem or stem height can
aect the tension of the front brake cable, locking the front brake or
creating excess cable slack which can make the brakes and the shifters
inoperable. If the brake pads move in towards the wheel rim or out away
from the wheel rim when the stem or stem height is changed, the brakes
must be correctly adjusted before you ride the bicycle.
Some bicycles are equipped with an adjustable angle stem. If your
bicycle has an adjustable angle stem, ask your dealer to show you how
to adjust it. Do not attempt to make the adjustment yourself, as changing
stem angle may also require adjustments to the bicycle’s controls.
WARNING: Always tighten fasteners to the correct torque. Bolts that
are too tight can stretch and deform. Bolts that are too loose can move
and fatigue. Either mistake can lead to a sudden failure of the bolt,
causing you to lose control and fall.
Your dealer can also change the angle of the handlebar or bar end
extensions.
WARNING: An insuciently tightened stem clamp bolt, handlebar
clamp bolt or bar end extension clamping bolt may compromise

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• A hollow axle with a shaft (“skewer”) running through it which has a
nut on one end and a tting for a hex key, lock lever or other tightening
device on the other (through bolt, g. 9)
• Hex nuts or hex key bolts which are threaded on to or into the hub axle
(bolt-on wheel, g. 10)
Your bicycle may be equipped with a dierent securing method for the
front wheel than for the rear wheel. Discuss the wheel securing method for
your bicycle with your dealer.
4. Tech
It’s important to your safety, performance and enjoyment to understand
how things work on your bicycle. We urge you to ask your dealer how to
do the things described in this section before you attempt them yourself,
and that you have your dealer check your work before you ride the bike. If
you have even the slightest doubt as to whether you understand something
in this section of the Manual, talk to your dealer. See also Appendix A, B, C
and D.
A. Wheels
Bicycle wheels are designed to be removable for easier transportation
and for repair of a tire puncture. In most cases, the wheel axles are
inserted into slots, called “dropouts” in the fork and frame, but some
mountain and road bikes use what is called a “through axle” wheel
mounting system.
If you have a mountain or road bike equipped with through axle front or
rear wheels, make sure that your dealer has given you the manufacturer’s
instructions, and follow those when installing or removing a through axle
wheel. If you don’t know what a through axle is, ask your dealer.
If you do not have a bicycle with a through-axle wheel mounting system,
it will have wheels secured in one of three ways:
• A hollow axle with a shaft (“skewer”) running through it which has an
adjustable tension nut on one end and an over-center cam on the other
(cam action system, g.8 a & b)

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device to reduce the risk of the wheel disengaging from the fork if the
wheel is incorrectly secured. Secondary retention devices are not a
substitute for correctly securing your front wheel.
Secondary retention devices fall into two basic categories:
a. The clip-on type is a part which the manufacturer adds to the front
wheel hub or front fork.
b. The integral type is molded, cast or machined into the outer faces of
the front fork dropouts.
Ask your dealer to explain the particular secondary retention device on
your bike.
WARNING: Do not remove or disable the secondary retention device.
As its name implies, it serves as a back-up for a critical adjustment. If
the wheel is not secured correctly, the secondary retention device can
reduce the risk of the wheel disengaging from the fork. Removing or
disabling the secondary retention device may also void the warranty.
Secondary retention devices are not a substitute for correctly securing
your wheel. Failure to properly secure the wheel can cause the wheel
to wobble or disengage, which could cause you to loose control and fall,
resulting in serious injury or death.
2. Wheels with cam action systems
There are currently two types of over-center cam wheel retention
mechanisms: the traditional over-center cam (g. 8a) and the cam-and-cup
system (g. 8b). Both use an over-center cam action to clamp the bike’s
wheel in place. Your bicycle may have a cam-and-cup front wheel retention
system and a traditional rear wheel cam action system.
It is very important that you understand the type of wheel securing method
on your bicycle, that you know how to secure the wheels correctly, and
that you know how to apply the correct clamping force that safely secures
the wheel. Ask your dealer to instruct you in correct wheel removal
and installation, and ask him to give you any available manufacturer’s
instructions.
WARNING: Riding with an improperly secured wheel can allow the
wheel to wobble or fall o the bicycle, which can cause serious injury
or death. Therefore, it is essential that you:
1. Ask your dealer to help you make sure you know how to install and
remove your wheels safely.
2. Understand and apply the correct technique for clamping your wheel
in place.
3. Each time, before you ride the bike, check that the wheel is securely
clamped.
The clamping action of a correctly secured wheel must emboss the
surfaces of the dropouts.
1. Front Wheel Secondary Retention Devices
Most bicycles have front forks which utilize a secondary wheel retention

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requires special knowledge. Incorrect removal or assembly can result in
brake or gear failure, which can cause you to lose control and fall.
CAUTION: If your bike has a disc brake, exercise care in touching the rotor
or caliper. Disc rotors have sharp edges, and both rotor and caliper can get
very hot during use.
a. Removing a disk brake or rim brake Front Wheel
(1) If your bike has rim brakes, disengage the brake’s quick-release
mechanism to increase the clearance between the tire and the brake pads
(See Section 4.C g. 11 through 15).
(2) If your bike has cam action front wheel retention, move the cam lever
from the locked or CLOSED position to the OPEN position (gs. 8a & b).
If your bike has through bolt or bolt-on front wheel retention, loosen the
fastener(s) a few turns counter-clockwise using an appropriate wrench,
lock key or the integral lever.
(3) If your front fork has a clip-on type secondary retention device,
disengage it. If your front fork has an integral secondary retention device,
and a traditional cam action system (g. 8a) loosen the tension adjusting
nut enough to allow removing the wheel from the dropouts. If your front
wheel uses a cam-and-cup system, (g. 8b) squeeze the cup and cam lever
together while removing the wheel. No rotation of any part is necessary
with the cam-and-cup system.
You may need to tap the top of the wheel with the palm of your hand to
release the wheel from the front fork.
b. Installing a disk brake or rim brake Front Wheel
a. Adjusting the traditional cam action mechanism (g. 8a)
The wheel hub is clamped in place by the force of the over-center cam
pushing against one dropout and pulling the tension adjusting nut, by way
of the skewer, against the other dropout. The amount of clamping force
is controlled by the tension adjusting nut. Turning the tension adjusting
nut clockwise while keeping the opened cam lever from rotating increases
clamping force; turning it counterclockwise while keeping the opened
cam lever from rotating reduces clamping force. Less than half a turn of
the tension adjusting nut can make the dierence between safe clamping
force and unsafe clamping force.
WARNING: The full force of the cam action is needed to clamp the
wheel securely. Holding the nut with one hand and turning the lever
like a wing nut with the other hand until everything is as tight as you
can get it will not clamp a cam action wheel safely in the dropouts. See also
the rst WARNING in this Section, p. 18.
b. Adjusting the cam-and-cup mechanism (g. 8b)
The cam-and-cup system on your front wheel will have been correctly
adjusted for your bicycle by your dealer. Ask your dealer to check the
adjustment every six months. Do not use a cam-and-cup front wheel on any
bicycle other than the one for which your dealer adjusted it.
3. Removing and Installing wheels
WARNING: If your bike is equipped with a hub brake such as a rear
coaster brake, front or rear drum, band or roller brake; or if it has an
internal gear rear hub, do not attempt to remove the wheel. The
removal and re-installation of most hub brakes and internal gear hubs