Wisper 905 ECO User manual

- 1 -
Owner’s Manual
Operation and Maintenance Instructions
Wisper 905eco
January 2009 1
st
edition
We strongly recommend that you read this entire manual be ore
using your Wisper bike
Wisper Limited

- 2 -
905eco User Guide
Introduction Page 3
Part 1 Caring for your Wisper bike and pre use checks
1 Be ore you set o or the irst time Page 4
2 Be ore each use Page 5
3 Battery care Page 5
4 Recharging your battery Page 6
5 Water Page 6
6 Maintenance and adjustments Page 6
7 Technical speci ications and per ormance Page 8
8 Simple trouble shooting Page 9
Part 2 Controls and quipment
9 Battery on o and battery lock Page 9
10 The red button Page 10
11 The green button Page 10
12 Pedelec mode and High Low button Page 10
12 Throttle Page 11
13 Brakes Page 11
14 Steering stem and handle bar clamp Page 12
15 The ront connection box Page 13
16 Quick release saddle height adjustment Page 13
17 Saddle post suspension Page 13
18 Rims and spokes Page 13
19 Chain and drive wheel Page 14
20 Derailleur Page 14
Warranty Page 17
Getting the best possible range from your Wisper bike Page 18

- 3 -
Introduction
Thank you or choosing a Wisper electric bicycle. By making the decision to use an
electric bike you are helping to sa eguard our environment by saving our planet’s
precious resources and reducing carbon pollution.
Be ore you use your Wisper bike it is important that you read this manual care ully. I
there is anything you do not understand completely please contact us or your retailer.
Please observe tra ic regulations, and don’t lend your bicycle to anyone who is
un amiliar with it. The bicycle can only legally be used on the road by a person aged 14
years or older.
We strongly advise you to always wear a cycle helmet when using your bicycle and i
you are un amiliar with cycling to attend a cycle pro iciency course prior to using it. Your
Wisper Works 905eco is not a toy and should be considered a serious mode o transport.
As with all bicycles it is important that you stay within sa e limits, i you eel as i you are
traveling too quickly or the road conditions you probably are so slow down.
Test your brakes prior to using the bike every time you use it and remember the bike
will not stop as quickly in wet or icy conditions as it would on a dry road.
Frequently check your tyre pressures. They should be 60 psi or 4.1 bar. Low tyre
pressures will result in damage to the tyres and will massively reduce your range.
Be ore you use the bike or the irst time you must make absolutely certain that it has
been correctly built. You can do this by either taking it to your nearest cycle engineer or
i you are pro icient in cycle mechanics inspecting it yoursel . In particular you must
make sure that the pedals, saddle, handle bars and any sel assembly items have been
correctly itted.
N V R drink alcohol and ride your electric bike. The use o alcohol greatly reduces
re lexes and limits your ability to ride sa ely. Even a very small amount o alcohol will
limit your ability to be sa e on the road.
When you need to replace your battery please either dispose o it properly or pre erably
send it back to us or your retailer and we will make sure it is properly recycled.
Happy cycling!
Wisper Ltd

- 4 -
Part 1 Caring for your Wisper bike and checks
Although your Wisper bike has been thoroughly tested prior to delivery, it is very
important that you check the bike thoroughly be ore its irst use. Equally important are
requent and regular spot checks they will protect you and your Wisper bike.
Please read this manual carefully. Only on full understanding of all the functions of this
electric bicycle should you attempt to use it.
Your Wisper bike has been transported in a strong twin walled carton, to save space it
has been delivered with the ront wheel, handlebars, seat post and seat, rear rack* and
pedals ready or assembly with the tool kit provided**.
* Rack not supplied on all models
** Your retailer may have assembled your bike or you i not you will ind itting
instructions on the Wisper website www.wisperbikes.com
1 Be ore you set o or the irst time
1.1 Check the handle bars and handle bar stem are properly tightened.
1.2 Check all other nuts and bolts and ixings are properly tightened, pay particular
attention to the motor ixings, side kick stand, yoke and steering head bearings.
1.3 Check brakes and brake isolators are unctioning properly.
1.4 Check tyre pressures are 60psi / 4.1bar and tyres are not damaged.
1.5 Check re lectors and lights are unctioning properly.
1.6 Make sure battery is ully charged.
1.7 Load battery into bicycle and turn on with key.
1.8 Check the power indicator lamps are illuminated on the right hand side o the
handle bars i they do not illuminate press the red on / off switch once.

- 5 -
1.9 To avoid dangerous unplanned acceleration, always make sure that the
electrical system is turned o and the power indicator lamps are not
illuminated when mounting, dismounting or leaving the bike unattended. For
your sa ety, please turn o the power key on the battery when stopped or
walking the bike.
1.10 Remember to validate your warranty by visiting
www.wisperbikes.com/mywarranty and illing in your details.
2 Be ore each use
It is important you per orm a quick check o your bike every time you use it, checks
should include the ollowing, i you ind any damage or problems do not use the bike
until the problem has been solved or you have had the aulty item checked by a bike
mechanic or your retailer.
2.1 Check tyres or any visible damage
2.2 Check tyre pressures (60psi / 4.1bar)
2.3 Check or any lose nuts bolts or ixings
2.4 Check brake unctions
2.5 Check electronic unctions
2.6 Check re lectors are in place and lights are working
2.7 Check your battery or any visible signs o damage
3 Battery care
3.1 Be ore you use the battery or the irst time it is best to give it a ull deep charge
or 12 hours. To ully condition your new battery give it complete deep charge,
discharge cycles or the irst three charges. This is achieved by charging your
battery or 12 hours and then using the bike until the battery is completely
drained. A ter this “conditioning” process you can then charge and discharge
the battery as and when you require or long or short periods.
3.2 I you are going to leave your battery uncharged or more than eight weeks it is
best le t hal charged. You should then re charge it every our weeks or two
hours to keep it in top condition.
3.3 Be ore setting o on any journey it is always better to have a ully charged
battery.
3.4 Always remember that you use up to three times more power when setting o
under the twist throttle. To preserve the li e o each charge always set o using
pedal assist.
3.5 Do not expose the bicycle or battery pack to ire, heat sources, acid or alkaline
substances.

- 6 -
3.6 When leaving your bicycle during hot weather always leave in a shaded well
ventilated area
3.7 For best results always recharge the battery at room temperature
3.8 Be ore unloading the battery make sure it is turned o at the key, then raise the
saddle and unload the battery using its handle
3.9 I your battery is damaged or appears to be overheating or any reason
immediately return it to your retailer or advice and a sa ety check
4 Recharging your battery
4.1 First make sure the charger is turned o , connect
the output connector plug rom the charger to the
battery, connect the charger to the mains and turn
on the mains power. Turn on the charger. The red
and yellow lamps on the charger indicate the
battery is charging, when the yellow light turns
green the battery ully charged. Always turn o the
charger and disconnect rom the mains a ter
charging. Always disconnect the charger rom the
mains be ore disconnecting the charger rom the
battery. It is possible that the battery will take up to
12 hours to charge on the irst three charges.
4.2 When charging the battery always do so in a dry and well ventilated area.
4.3 Do not leave the charger connected to the mains when not in use.
5 Water
5.1 Your electric bicycle is rain and splash proo and can be used in all weathers.
5.2 The electrical components o the vehicle, such as motor, battery, and controller,
must not be submerged in water.
6 Maintenance and adjustments
6.1 IMPORTANT! Do not attempt to open the casings o the battery, motor or
controller it could be dangerous and all warranties will become void. I you
experience a problem contact our service department or your retailer.
6.2 Wheel spokes should be adjusted a ter 300 miles riding.
6.3 Handlebar and saddle tubes should never be raised beyond the maximum
indicated by a sa ety line around the tubes.

- 7 -
6.4 Torque recommendations
Front axle nuts 46N.m
Back axle nuts 70N.m
Handlebar clamp Refer to illustration 15.1
Bolt 1 16N.m
Bolt 10N.m
Handlebar stem expander bolt 18- 0N.m
Seat pillar clamp nut/bolt 5-8N.m
Brake cable anchor bolt 5N.m
Brake centre bolt M6: 11N.m
Seat clamp nuts 4N.m
Cotter pin nuts R: 4 N.m
L: 46N.m
Gear shifter nuts 4N.m
V brake caliper nuts 10N.m
Rear carrier nuts 8N.m
Mudguard bracket nuts 8N.m
Other nuts torque depends on the size
M4 .5-4N.m
M5 4-6N.m
M6 6-7.5N.m
6.5 Your bike has a rear derailleur that will automatically tension your chain.
However i the chain becomes loose or requently comes o the ront cog, you
can easily adjust the chain tension by loosening the rear axle nuts slightly, and
adjusting the tension bolts. Make sure that the chain runs reely and re tighten
the axle nuts.
6.6 The brake leavers should lock the wheels when compressed hal way between
their open position and touching the handle bars. When they need adjusting
please ollow the instructions on our web site www.wisperbikes.com Electric
Bikes, Manuals.
6.7 Warning Handlebar hand grips or tube end plugs should be replaced i damaged,
as bare tube ends have been known to cause injury.
6.8 Warning I replacing orks they must have the same rake and same tube inner
diameter as the originally itted to the bicycle.
IMPORTANT braking distances increase on wet or icy roads.

- 8 -
6.10 Regularly lubricate the gears and chain with light oil and the brake bushes (not
the rubber brake shoes or disc) with a little grease.
6.11 Recommended tools or proper maintenance
Torque wrench with N.m gradations
2, 4, 5, 6, 8 mm Allen wrenches (keys)
9, 10, 15 mm open-end wrenches
15 mm box end wrench
Socket wrench, 14, 15, and 19 mm socket
T25 Torque wrench
No. 1 Phillips head screwdriver
Bicycle tube patch kit
Tyre pump
7 Technical specifications & performance
Type Wisper Works 905eco
Performance (with 75kg 165lb rider)
Assisted range 8A up to 65k m (39 miles)
Battery only 8a up to 42km (25 miles)
Maximum speed 25kph (15.5mph)
Weight with battery 23.6kg max
Maximum load 130kg (240kg)
Battery specifications
Cell Type Advanced Environmental Lithium Polymer with BMS
Capacity 8Ah
Rated voltage 37V
Main Controller specifications
Low voltage sa eguard 31.5V
Overload current sa eguard 15A
Main hub motor specifications
Motor type Hi speed brushless
Rated power Aus NZ 200W / Europe 250W / USA Canada 250W
Rated voltage 36V
Charger Lithium 115 to 230V 36V an cooled

- 9 -
8 Simple Trouble shooting
Problem Possible reasons Trouble shooting
Top speed too
slow
1. Low battery voltage
2. Handle bar control problem
3. Damage to motor driveline
1. Recharge battery ully
2. Call service
3. Call service
Power on but
motor not working
1. Battery not connected position
2. Fused
3. Motor connection damaged
4. Handle bar control problem
1. Re install battery
2. Replace use
3. Call service
4. Call service
Driving shorter
distance per
recharge
1. Tyre pressure too low
2. Undercharge or charger ault
3.
Battery capacity loss or
damage
4. Hill climbing, requent stops,
strong head winds, over
loading
1. Check pressures
2. Recharge completely or
have charger inspected
3. Replace battery
4. Use power assist and try and
avoid throttle only
Part 2 Controls and quipment
In this section we will describe the unctions and any speci ic maintenance needed on all
the main controls and ancillary equipment.
9 Battery on o and battery lock
9.1 Your Wisper bike has 1 set o 2 keys. The key or turns the battery on/o and
locks the battery in the bike. Please keep a care ul note o the key numbers as
we cannot replace them without these numbers should they become mislaid.
9.2 On bikes built a ter April 2009 the battery is connected to the electrical system
o the bike automatically when you slide the battery into the rame. Pre April
2009 bikes need to be connected via a cable that plugs into the side o the
battery. To turn on the bikes electrical system, turn the key in the battery
clockwise, to turn o the power turn the key anti clockwise.

- 10 -
9.3 When the battery key has been turned to the on position the bike is ready or
use. The red button on the handle bar isolates the power rom the bike, when
the bike is “on” you will see the battery power lights illuminate above the red
button. When the bike is “o the lights are not illuminated. When the bike is
“o ” you will not get any assistance rom the battery and motor and the bike is
e ectively an unpowered push bike. Press the red button to toggle between
“on” and “o ”
9.4 To lock the battery into the bike rame turn the key clockwise to unlock turn the
key anti clockwise. Read 3 and 4 or battery care and advice on charging at the
beginning o this manual.
9.5 The battery can be charged either on or o the bike.
9.6 To remove the battery turn o the power by turning the key to position “OFF”, I
your battery has a socket in its side (pre April 2009) disconnect the plug and
socket. I your bike is itted with a connector at its base (a ter April 2009) this is
not necessary. Remove the seat post. Using the handle on top o the battery li t
the battery out.
9.7 To replace the battery reverse the procedure or removing it.
On the handle bars
10 The red button
10.1 When the red button is pushed and the lights go out you have turned the bike
“o ”. When the bike is “o ” you will not get any assistance rom the battery
and motor and the bike is e ectively simply an unpowered push bike. To turn
the power back on so the pedelec and throttle work again simply press the red
button once, the lights will illuminate above the red button showing the power
is on.
11 The green button
11.1 The reen or derestrict button is not available on the 905eco
12 Throttle
12.1 The throttle can be used in some countries such as the UK, Australia, New
Zealand USA, and Canada independently to the pedelec mode. Check with your
supplier i it is legal in your region. Bikes are usually set up to be legal in the
region in which they are supplied.
12.2 The independent use o the throttle, when available, will enable you to use the
throttle without pedaling.

- 11 -
12.3 The use o the throttle in pedelec mode is legal in most countries. Use o the
throttle in pedelec mode enables you to turn up the power to the motor as long
as you are pedaling the bike, i you stop pedaling the motor will stop too. I you
have the pedelec mode set to Low, you can increase the assistance rom the
motor rom 40% to 100% o available power simply but turning the throttle
towards you. This also works in High mode and will let you increase the power
rom 80% to 100% o available power.
IMPORTANT Make sure your throttle grip and the grip on the left hand side of your
handle bars are always intact, in good condition and on the bike. Uncovered handlebar
tubes can be very dangerous in case of a collision.
13 Brakes
13.1 Front: V brake Rear: V brake
13.2 The brakes on your Wisper bike are itted with cut outs which are required by
law. This means that when you pull on either the back or ront brake lever the
motor immediately stops working.
13.3 How to adjust and maintain your brakes
Once a month, inspect brake pads or wear. I the grooves in the braking
sur ace are less than 2 mm deep replace the pads. Replace disc brake pads that
are thinner than 1.0 mm.
To replace V brake pads
13.3.1 Use 5mm Allen key to loosen bolt A and
take the cable out. Use 5mm Allen key
to undo bolt C on the right & le t, and
remove the spacers and washers.
13.3.2 Install new brake pads, then with both
pads pressed against the wheel rim,
ensure that distance B (in the diagram)
does not exceed 65mm. To decrease
distance-B, exchange wide & narrow
spacers on each brake pad. Be ore
inally tightening brake pads, make sure
they are aligned correctly on the rim,
and there is a gap o 1mm between the
top o the rim and the top o the pad.
Hold each pad against the rim (one at a
time) & tighten bolt C. Finally tightening them to 6-8N.m

- 12 -
13.3.3 Insert cable back into bolt A, slot cable guide pipe into holder and it
protector over guide pipe end. Set cable in bolt A so that the combined
pad/rim clearance (the gaps rom le t pad to le t rim sur ace and rom
right pad to right rim sur ace) is 2mm, then tighten bolt A. Finally
tightening it to 6-8N.M.
Balance brake arms with screw D. Depress brake lever a ew times while
Checking to see that tension is equal or both arms. Pad/rim contact
should occur at the same time each side. Clearance should be 1mm each
side.
13.3.4. Adjust pads so they are properly aligned (see step 2), as tension
adjustment will probably have altered original pad alignment.
Warning: If you are unsure about any part of the installation process you should seek
advice from Wisper service center or qualified mechanic.
14 Stem handle bar clamp
14.1 Your bike has been itted with a quick release handlebar clamp that allows you
to change the position o the bars quickly and easily to ind the most
com ortable riding position.
14.2 The stem and handle bars need to be itted be ore you use the bike.
14.3 To it, insert the stem into the ront tube at least to the position o the
“Minimum insertion” mark.
14.4 Tighten the quill bolt and ix stem.
14.5 Push in the direction o the arrow slide cap 1 and li t lever 2.
14.6 Adjust stem to pre erred angle and lightly tighten BOLT 1 then turn BOLT 2
to suitable position so that the slide cap 1 will it when locked, then press down
lever 2 to lock the handle bars in position.
14.7 Test the bars to make certain they are tight and do not rotate. I they are not
tight enough, li t lever 2, adjust BOLT 2 again then press down lever 2. Repeat
until the handle bars are tight and sa e.

- 13 -
IMPORTANT when fitting always lock Bolt 1 first so the body and first cap touch then
lock Bolt 2.
14.8 When adjusting stem angle, it is not necessary to adjust bolts.
15 The ront connection box
15.1 The ront connection box allows or the easy removal or repair
or replacement o any o the electronic components on the handle
bars.
16 Quick release saddle height adjustment
16.1 Your Wisper bike has been itted with a quick release saddle post collar to
acilitate the movement o the saddle to remove the battery or to change the
riding position.
16.2 It is important that the nut on the collar is tightened so the post will move in
the bike tube irmly. Make this adjustment with the quick release lever in the
open position.
16.3 Adjust the seat to the correct height and close the lever. When you sit on the
saddle there should be no vertical movement at all in the saddle post.
17 Saddle post suspension
17.1 For your com ort your bike has been itted with saddle post suspension it has
been set or a person weighing 75kg. I you are lighter than this you may not
eel any bene it and i you are heavier you may eel the suspension bottoming
out.
17.2 The suspension post can be adjusted by removing the whole post with saddle
attached rom the bike. On the bottom o the post you will ind an alan key
adjuster simply turn it clockwise to tension the spring or heavier people and
anticlockwise to release tension or lighter people.
IMPORTANT never raise the saddle past the point where the maximum marks on the
saddle post are visible above the quick release collar
18 Rims and spokes
18.1 It is essential to get your spokes checked and tightened a ter 300 miles. This is a
ree service provided by your supplier. I this service has not been undertaken at
the correct time this may cause damage to the wheels and spokes that will not
covered under our guarantee.

- 14 -
19 Chain and drive wheel
19.1 The chain and drive wheel are made rom rust proo materials.
19.2 Lightly oil with bicycle chain oil the chain at least once a month.
19.2 Because your bike has a rear derailleur the chain will be automatically adjusted.
20 Derailleur maintenance and adjustment
20.1 Required Tools You’ll need a dry cloth, a Phillips screwdriver, a 5mm Allen
wrench, and a light lubricant.
20.2 Rear Derailleur
20.3 How derailleur work Almost all modern derailleur unction the same basic way.
They are designed to move (or derail) the chain rom one sprocket to the next.
The upper guide pulley (or jockey pulley) moves the chain in both directions.
For instance, when you want to climb a hill, you shi t down to a lower gear. This
pulls the shi t cable and orces the guide pulley to change to a bigger sprocket.
When you want to go aster, you adjust the shi ter to a higher gear. This
releases shi t cable tension and allows the derailleur springs to pull the guide
pulley back down to a smaller gear. Each time you shi t gears, the length o
chain changes. The lower tension pulley is spring-loaded to take up this slack.
20.4 Adjustment screws There are 3 adjustment screws - the B-Screw (B-tension
adjustment), the H-Screw (high gear limit stop) and the L-Screw (low gear limit
stop). Adjustments on these screws should always be made in 1/4 turn
increments.

- 15 -
20.5 B-Tension Adjustment The B-Screw controls the derailleur body’s angle in
relation to the sprocket-set. Shi t down to the largest sprocket and check the
distance between the guide pulley and the large sprocket. I the guide pulley is
rubbing on the sprocket, tighten the B-screw clockwise to increase tension and
move the pulley away rom the sprocket. I there is a large gap between the
pulley and sprocket, loosen the B-screw until the pulley rubs the sprocket, and
then tighten it until it just clears.
20.6 High Gear Limit Stop The H-Limit screw high gear limit stop prevents the guide
pulley rom shi ting any urther past the highest gear and into the axle. In order
to adjust it properly there must be no tension on the lower inner cable. I you
eel tension, loosen the cable adjuster until there is none. Now check rom
behind how the chain is riding on the smallest sprocket. I it looks like it wants
ride o into the axle, tighten the H-screw clockwise until it lines up. I it looks
like it is rubbing on the next gear, loosen the screw until the chain is nicely
centered on the sprocket. Now re-adjust the cable tension until the derailleur
shi ts smoothly down to the next gear.
20.7 Low Gear Limit Stop The L-Limit screw prevents the guide pulley rom shi ting
any urther past the lowest gear and into the wheel spokes. Shi t down to the
lowest gear, step behind the bike, and check how the chain rides on the
sprocket. I it looks like it wants to ride into the spokes, tighten the L-screw
clockwise until it is centered on the sprocket. I it looks like it wants to shi t
down, loosen the screw until it lines up. As an extra precaution you can use
your thumb to gently push the derailleur body and make sure the chain will not
run into the spokes, as this could obviously have a nasty e ect on both you and
your bike.
20.8 Cable Adjustment The cable tension adjuster de ines how ar up or down the
derailleur moves. Step back so you can see the chain and sprocket alignment,
and then through the gears in both directions, irst shi ting up two and down
one, and then down two and up one. The chain should look centered on each
sprocket. I it is rubbing on a larger gear it means there is too much tension on
the cable. Loosen the tension by turning the adjuster clockwise. I it wants to
jump down to a smaller gear it needs more tension. Increase the tension by
turning the adjuster counter-clockwise.
20.9 Adjusting by ear You can also use sound to check the adjustment. There is
always a base-level o noise that can be heard in every gear. This noise will
increase in a slightly di erent way depending on which way the tension is out
o adjustment. I there is too much tension you will hear a metallic rubbing
sound, but i there is too little tension you will hear a clicking noise as the chain
tries to jump to a smaller sprocket. There is usually a cable tension adjuster on
your shi t lever. With practice you will be able to make small cable tension
adjustments while you are riding.

- 16 -
20.10 Lubrication Now that the derailleur is adjusted, always apply a drop o
lubrication to the derailleur’s many moving parts. This will help prevent wear
rom dirt and rust, and it will keep your gears shi ting smoothly. Wipe away any
excess lube and take your bike or a test ride to make sure all the gears are
working smoothly.

- 17 -
Warranty
Repair or replacement of components
IMPORTANT To validate this Warranty the retail customer must register the bike at
www.wisperbikes/mywarranty within 14 days of purchase.
Only use this product in accordance with this user manual. We offer a limited warranty of on the
following items.
1 The main frame Si years
2 Gears, hub motor, bearings, front forks Two years
3 Paintwork (e cluding deliberate or accidental damage) Two years
4 Controller and Charger Two years
5 Battery casing, battery leak, battery capacity step-down more than 30% Two years
6 Handle bar controls, brakes (e cluding brake shoes and pads) One year
7 Front and rear a le, flywheel or chain wheel One year
8 Electro plating, on wheel rims, rack and kickstand Si months
9 Other cases that render the bike unsafe to use. By negotiation
1. If the product has a quality fault within 15 days of delivery the part will be repaired or replaced or
in e ceptional circumstances we may replace the whole vehicle.
2. The period of assurance shall commence from the day delivery was made to the retail customer,
or from the day the retail customer collected the bike from the retailer.
3. To validate this Warranty the retail customer must register his / her bike at
www.wisperbikes/mywarranty within 14 days of purchase.
Exceptions to Limited Warranties
1. Damage resulting from misuse, not maintaining the vehicle or not following the guidelines within
this user guide
2. Accidental or deliberate damage
3. Damage due to private repair or alteration by user or unauthorised service centre.
4. Failure to produce invoice or proof of purchase.
5. Spare parts and components worn in normal use.
6. Failure to register your bike at www.wisperbikes/mywarranty within 14 days of purchase.

- 18 -
It is essential to get your spokes checked and tightened after 300 miles. This is a free
service provided by your supplier. If this service has not been undertaken at the
correct time this may cause damage to the wheels and spokes that will not be covered
under our guarantee.
Getting the best range rom your electric bike.
The range you can achieve rom your Wisper electric bike can be reduced dramatically
or some very simple reasons. Im good conditions you should be able to achieve the
ollowing ranges rom your bike when using pedal assist.
8A battery 39 miles (65km)
To make sure you optimise your range please ollow the guidelines set out below.
1 When using ull throttle rom stationary, your 250W motor will draw about 550W.
Consider that when cruising along at 15mph / 25kph, with mild pedalling, you only
draw about 150W hence, using pedal assist instead o ull throttle rom stationary
saves a good amount o power and will increase your range.
2 Check your tyre pressures. The rolling resistance on the road is at is least when the
tyres are at the correct pressure 60psi or 4.1bar. Hal lat tyres can hal your
range!
3 Air resistance is important i you are wearing big baggy clothes in the winter expect
lower range than in the summer when your clothing is less air resistant. Also
remember that panniers and bags on the handle bars reduce range.
4 Weight a ects the range considerably. I you are carrying extra weight in your
panniers or towing you range will e ected.
5 Battery temperature will make a serious di erence in achievable range. It is best
to charge your battery at room temperature keep it indoors be ore you start your
journey with the maximum range available by loading a warm battery.
There are o course other actors such as bike maintenance, terrain, road conditions and
weather but i you keep the ive points mentioned above in mind you will ind your
range is massively improved.
Copyright January 2009 Wisper Ltd