Decathlon BTWIN User manual

User Guide and Guarantee

USER GUIDE AND GUARANTEE INSTRUCTIONS
THANK YOU FOR BUYING A DECATHLON BICYCLE !
You have just bought a Decathlon bicycle. In order for the bicycle to give you
riding pleasure for as long as possible, please read this user guide. It will give
you information necessary for adjusting, maintaining and properly using your
Decathlon bicycle.
Keep this guide in a safe place.
DECATHLON IS NOT LIABLE FOR ACCIDENTS OR INJURIES DUE TO IMPROPER USE
OF THE PRODUCT, FAILURE TO ADHERE TO THE INSTRUCTIONS GIVEN IN THIS
GUIDE, OR MODIFICATIONS TO THE PRODUCT.
WHILE EVERY EFFORT HAS BEEN MADE TO ENSURE THAT THE INFORMATION
CONTAINED IN THE GUIDE IS ACCURATE AND COMPLETE, DECATHLON IS NOT
LIABLE FOR ANY ERRORS OR OMISSIONS.
Maintaining your bicycle means it will keep its original qualities and its safety
features.
Along with our technicians, we guarantee you a bicycle that is properly
assembled and correctly adjusted.
Maintenance, adjusting and repairs
To reduce the risk of accidents and injury, look after your bicycle and have it
repaired in our after sales service departments.
Your Decathlonretailer
In addition to this guide, your Decathlon store is your main source of information
and assistance. Your retailer is your first contact for maintaining, adjusting and
using your bicycle as well as its guarantee.
Guarantee
You also find in this guide all necessary information on your bicycle’s guarantee.
Call centre No Reduce rate n° 08100808808

INDEX
bicycle’s
IMPORTANT .....................................................................................................4
A BICYCLE FOR EVERY OCCASION ......................................................4
SAFETY PRECAUTIONS AND USER INSTRUCTIONS ..........................................6
FIRST SECTION
I Setting the riding position and safety
1/ Ensure that the bicycle is the right size ......................................................8
2/ Adjusting the height of your saddle....................................................... 8
3/ Setting the stem and the handlebar..........................................................10
4/ Safety ................................................................................................10
5/ Suspension........................................................................................12
6/ Maintenance of reflector ..................................................................... 12
II Maintaining your bicycle
1/ A bicycle should be maintained like a car............................................. 13
2/ Maintaining your bicycle will depend on the way you use it. ....................13
SECOND SECTION
III The necessary tools .........................................................................................17
IV Assembly and adjustments
1/ Adjust the bolt and quick fastener mechanism. .......................................17
2/ Pedals ...............................................................................................19
3/ Brake levers and calipers...................................................................... 19
4/ Gears changers .................................................................................21
5/ Bearing adjustment .............................................................................. 23
6/ Chain tension for single speed bicycles ............................................... 24
7/ Tightening the seat............................................................................... 25
8/ Fitting accessories ............................................................................25
V BMX BIKES
1/ Changing and adjusting rear brake cables ........................................... 26
2/ U-type brake ......................................................................................... 26
GUARANTEE CHARTER .............................................................................. 27
FREE REVISION........................................................................................... 28

IMPORTANT
Like all sports, cycling carries risks of injury and damage. USING YOUR BICYCLE,
YOU ASSUME RESPONSIBILITY FOR THIS RISK. DECATHLON SHALL NOT BE
RESPONSIBLE IN CASE OF MODIFICATION OF THE BICYCLE BY THE USER OR A
THIRD PARTY. You should know and comply with the local traffic rules. You are
responsible for properly maintaining and using your bicycle, thus reducing the
risk of injury.
Rear derailleur Chain Crankset Pedal
Wheel Rim Tire
t’
A BICYCLE FOR EVERY OCCASION.
A brief guide for choosing without getting it wrong!!
The Mountain Bike : has imposed itself today as the ideal
article for getting off the road and wandering around
the countryside and in forests and mountains. With its large tires, it is stable and
gets through mud, gravel or sand pathways without difficulty.
All suspension mountain bike, with its telescopic fork and suspension, this is the
ultimate sporting bike.
Children's bicycles (16” to 24”) :
Seatpost
Rear brake
Frontbrake
Crank

Hybrid bicycles : an ideal compromise between town bicycles and mountain
bikes. Comfortable, well-equipped, this bicycle will accompany your solo rides,
with the family or friends on small country roads or pathways. Its wheels are
thinner than those of a mountain bike and its diameter is larger, it is therefore
more comfortable on tarmac roads. It’s the ideal bike for a stroll!
Town bicycles : Perfectly fitted, comfortable, it is ideal for
travelling securely in towns, in the middle of traffic.
Robust, it is perfect to ride on paving stones. Impeccably clean with its mud-
guards and chain cover, you can wear town clothes without any problem. It is the
perfect town bicycle.
Road bicycles : They will accompany you outdoors and will
be your perfect companion in grinding out the miles.
For fitness (to train alone or with friends) or for competition, it is perfect for
staying in shape and will be a good supplement to a mountain bike.
BMX : specifically designed for acrobatic disciplines
Several types of discipline: Street for figures in towns or in
skate parks ; Dirt for jumps with figures on earth mounds ; Flat for figures on the
ground ; Racing on an earth circuit with bumps.
So properly identify your discipline.
Children's bicycles (16” to 24”) : Look, price, accessories, etc.
can be customized according to your requirements. It is great to
ride and have fun in full safety. Well fitted, comfortable, solid,
practical and full of clever tricks, it will be the ideal friend for
going to school and outsideschool activities.
st
ake
ank

SAFETY PRECAUTIONS AND USER INSTRUCTIONS
Greatadviceforridingin completesafety
Always carry out a complete check of the bicycle before
riding. Please thoroughly read the safety section I 4/
Always wear a helmet when you are riding to protect your head
in a fall.
Ride in the same direction as traffic, never against the flow
Never attach yourself to a car or any other vehicle
Check your speed, avoid big differences
Please avoid riding two on abike or carrying heavy or bulky luggage. This may
obstruct your visibility or limit your control, and can lead to afall or losing
control of the bicycle.
If you are riding at night or in bad weather :
Wear reflective and clear clothing and equip your bicycle with front and rear
lighting: lighting and red reflectors at the rear and lights and yellow or white
reflectors at the front as well as side reflectors on the wheels. Ensure your bike is
fitted with reflectors. If you are surprised by rain, remember that breaking
distances increase during rain and visibility and adherence are reduced.
Lighting might be compulsory for riding at dusk, at night or at dawn,
please refer to your local traffic rules.
NB: A person must not ride a bicycle on a road, during the hours of darkness unless the
bicycle displays a white light that is clearly visible for a reasonable distance from the front of
the bicycle and displays (i) a red light that is clearly visible for a reasonable distance from the
rear of the bicycle; or (ii) a red reflector that is clearly visible for a reasonable distance from
the rear of the bicycle when light is projected onto the reflector. No bicycle shall show any
light other than a red light to the rear.
Access to pathways, responsible riding and code of good riding.
Do not consider access to pathways guaranteed. Your behavior on your next ride
will influence accessibility to pathways for others in the years to come. Limit
skidding, avoid muddy areas and remain courteous with walkers.
The B’twin Bicycle is not a toy
bike’s

NB: A person must not ride a bicycle on a road, during the hours of darkness unless the
bicycle displays a white light that is clearly visible for a reasonable distance from the front of
the bicycle and displays (i) a red light that is clearly visible for a reasonable distance from the
rear of the bicycle; or (ii) a red reflector that is clearly visible for a reasonable distance from
the rear of the bicycle when light is projected onto the reflector. No bicycle shall show any
light other than a red light to the rear.
To ride responsibly on pathways, here are some rules:
- leave no traces
- control your bicycle
- always let others pass
- do not frightenanimals
- look in front of you
- do not leave trash, keep your waste in your pockets
The B’twin Bicycle is not a toy. This product is not suitable for use by children
under the age of 6. Use by a child aged 6 to 12 years must be under the full and
direct supervision of a responsible adult. An adult should review and explain the
full set of instructions in this guide with the youth (age 6 years and over) before
going riding.
Warning : WHEN YOU ARE RIDING WITH CHILDREN :
- Decathlon recommends wearing a helmet and strongly advises fitting a baby
carrier and all frame accessories should be carried out by qualified and expe-
rienced mechanics. If you insist on fitting a baby carry by yourself, we recom-
mend that you check with our sales staff that the luggage carriers and baby
carriers are compatible with safety regulations.
- Be careful when you are riding with a baby carrier, it adds weight to the rear
and raises the bike’s centre of gravity, making balance and bends more difficult.
- Children must always wear helmets when they are transported on a baby carrier
or in a trailer.
- Wheels attract the attention of children and present a serious danger for young
fingers!! If a child puts his fingers in the spokes or between the chain and chain
wheel, this may lead to pinching and /or serious injury.
Warning: All frames and components should be checked on a
regular basis by our after sales department for signs of wear and/or essential
breakage (cracks, corrosion, breaks...). These are important safety verifications
to avoid accidents and body injuries and to make sure that your bike continues
to last and give you pleasure.
Warning: Downhill riding on mountain bikes should be made safe by
wearing reinforced clothing and ensuring that your bike is in perfect condition.
To minimize the risk of accident, wear a helmet, check your bike and be careful.

FIRST SECTION
I Setting the riding position and safety
1. Ensure that the bicycle is the right size
A bicycle that is too big or too small for riding is difficult to control and may be
uncomfortable.
Size of the frame (one inch = 25,4mm):
To check if the size of the bicycle is correct, just get on it and put your hands on
the handlebars. If your crotch touches the frame, the bicycle is too big for you.
There should be about one and two inches between your crotch and the frame.
•
•
SPORT COMPETITION
2/ Adjusting the height of your saddle
You should check the height of the saddle and handlebars, check the condition of
wear parts and maintain them to ensure complete safety.
•
•
Your crotch
Road frame
630 to 676
45
Your crotch
Road frame
715 to 746
49
Your size
Mountain bike
frame
Hybrid/town bike
frame
Btwin
frame
From 1m05 to 1m20
16” (4 to 7 years old)
From 1m15 to 1m40
20” (7 to 11 years)
20” Btwin
From 1m35 to 1m55
24” (from 8 years old)
City bike 24”
24” Btwin
From 1m55 to 1m60
S
S
S (24’’)
From 1m60 to 1m70
M
M
M
From 1m70 to 1m80
L
L
L
More than 1m80
XL
XL
XL

For your safety, the saddle
should not be raised above the
marker on the seat post.
• Mountain bike/Hybrid/town bike
For a good pedaling position, set your saddle height so
that with your leg extended your heel rests on the pedal (in
the lowest position)
Therefore, when pedaling your leg will be slightly bent at
the lowest point so that your hips do not sway and for easy
pedaling.
Rapid seat pin blocking will make tightening easier
To tighten, place the lever at 90°, completely hand tighten
the screw and pull the lever down. The force used should
be sufficient to block the seat pin.
•Road
Multiply the crotch value by 0.88 to
obtain your seat height, the distance
separating the center of your pedal
above your seat, that you will set parallel
to
the ground.
DECATHLON ADVICE
• Using a mountain bike, your saddle will be set in a high position when you are
on flat or rising ground to increase your pedaling power. However, going
downhill, to better control your bike, lower at the saddle so you can recover
your route by putting your feet on the ground.
• To set the saddle recoil: sat on the saddle, feet in the pedals (conventional or
automatic), the swivel joint should be perpendicular to the pedal spindle
when the crank is horizontal.
16” (4 to 7 years
20” (7 to 11 20”
24” (from 8 years 24” 24”
(24’’)

3/ Setting the stem and the handlebar
For your safety, the handlebar may be extended until the maximum
markers.
Maxi
(diagram 1)
• Road
Once the height of the saddle has
beendefined, establish thedifference
of 2 to 5 cm less, between the height
of the saddle and the height of the stem in a position that suits you, in any case
never exceed the dimension set by the manufacturer on the stem.
• Town/hybrid
Set the height of your handlebars to give you an upright and comfortable
position.
• MTB
Diver stems may be extended to the maximum markers (the stem may be extended
to the maximum markers (diagram 1). A Headset type stems cannot be set, except
adding a rain to raise it a little.
4/Safety
Are your saddle pin and stem properly tightened?
Firmly turn from one side to the other blocking the front wheel between your legs.
The stem should not move on the steering pivot. The saddle pin should also be
properly tightened in the saddle tube.
SAFETY: be careful not to exceed the manufacturers mark except uncertain moun-
tain bikes with an lowered upper tube wear the length of saddle pin should be
kept inside the frame.
Are your tires properly inflated, are they the correct dimension,
are they mounted in the right way?

Inflate your tires to the right pressure (fig.1)! You must follow the pressure range
shown on the side of the tire by the manufacturer, your tires and their resistance
to puncture depend on it. Mount the tire in the direction shown on the side (the
arrow showing rotation direction fig 2)
Fig.1
Fig.2
•
•
•
Note that 14.5 PSI= 1 BAR and 1 BAR=1 Kg/cm2= 100000 Pa
Is your fixing system properly tightened?
Carefully read the section concerning proper procedures to follow with quick
release fasteners IV 1/.
Do your front and rear breaks work properly?
Properly read the section concerning the proper procedures to follow the setting
leavers and brake calipers.
Break pads should be in firm contact with the rim without the brake lever blocking
against the brake handle.
With hydraulic brakes, check the lever is firm, that it is not too close to the handle,
and that there is no trace of leakage of brake liquid. With disc brakes activated
by cable, check the firmness of the lever and that it is not to close to the handle.
With all disc brakes, the plates should be in firm contact without the lever being in
contact with the handle.
Be careful of the heat given half by disc brakes after braking.
Can you change speeds easily?
Check that your speeds are flexible and that you can change them easily.
Thoroughly read the section on changing speeds and adjustments.
Do you wear a helmet, reinforced clothing and equipment like gloves
and glasses?
Never wear clothes that are too big and could get stuck in the wheels.

Is it raining or wet?
In this case, be even more careful. The risks in braking increase and the adheren-
ce of your tires on the road is reduced. Also remember that the visibility of motor
vehicles is reduced in bad weather.
Are your pedals properly tightened?
Check that your pedal is properly tightened to the crank. Read the section on how
to fix your pedals. IV 2/
How do clipless pedals function?
Engage and disengage your shoes in the pedals before leaving. Experienced
cyclists do this. The interface between the toe clip and the pedal may be affected
by different factors like dust, mud, lubrication, spring tension and wear. By enga-
ging and disengaging, you check operation and you familiarise yourself with the
feeling of the pedals.
CAUTION: Check the distance between the toe end and front wheel, this
could lead to a loss of control of the bike.
5/Suspension
See the instructions that you can check our website www.decathlon.com.
Even greater care should be taken with bicycles fitted with a telescopic fork; parti-
cularly telescopic forks assembled with fixing screws.
Each time, you should check that there is no play between the screws
and the assembled parts. If this was the case, see exclusively a professional or your
store to have them tightened as they will have to be covered with thread lock before
tightening.
Warning : Disconnection from the fork may cause the cyclist to fall.
6/Maintenance of reflector
Your reflectors are an important part of your bicycles safety equipment. Do not
remove the reflectors from your bicycle; they are here for your safety.
Every three months, make sure all the nuts and bolts holding the front, rear, pedal,
and wheel reflectors are tightened. Check that the front and the rear reflector are
oriented so that their reflective surfaces are perpendicular to the ground and that
all reflective surfaces are clean and in good condition. The front reflector should
point directly forward, and the rear should point directly backward. The rear
reflector should be at least three inches below the top of the seat.
To adjust the front and rear reflectors, bend the metal bracket, or loosen the
attachment screw on plastic brackets, reposition, and then re-tighten the screw.
frame’s

II Maintaining your bicycle
1/A bicycle should be maintained like a car.
Your bicycle needs a minimum of maintenance and regular revisions are
necessa- ry. Their frequency will depend on the type of bicycle (town, road,
mountain bike) and types of use.
CLEANING : Your bicycle may be cleaned simply with a water jet, soapy water
and a sponge. The transmission parts may be cleaned with a small brush.
Be careful with using high pressure cleaners! Do not use a vapor jet: grease may
liquefy inside mechanical parts, your bicycle will be permanently immobilized,
bearings and transmission completely seized up.
Avoid too powerful jets, they could damage the frame’s enamel. Avoid pointing
the jet at the mechanical parts. Wipe and dry your bicycle carefully.
OUR DECATHLON SELECTION: Greasing kit and oil, maintenance kit (brush,
degreaser, lubricant, grease).
LUBRICATION :
Use a Vaseline type oil for cables and transmission parts. It is preferable to use
specific oil for the chain.
Immediately after cleaning, oil transmissions, links and gear change wheels, shift
levers, brake levers, brake caliper spindles and the chain.
Thing to check and replace your chain (see terminals).
Sufficiently grease the saddle pin and plunge the stem for proper water tightness.
Certain hubs have a greasing hole: inject grease with a syringe.
The play in the cartridge type chain-sets needs no maintenance: sufficiently
water- tight, they are greased for the entire lifespan of the product.
OUR DECATHLON SELECTION: Teflon oil, greasepot.
Warning : All these operations should be renewed frequently in case of
use in a salty environment and before long-term storage.
2/Maintaining your bicycle will depend on the way you use it.
- Town and riding bicycles require periodic maintenance:
grease the chain, brush the cogs and plates, and put a few drops of oil on the
cable housing (brakes, gear changers), remove the dust from the brake rubbers
on a regular basis.
- Mountain bikes should be washed after intensive use on muddy and dusty
ground: frame, wheels, chain, plates and cogs.

Child
BMX
R oad
R oad
BMX
Town
Mountain bike
Mountain bike
Town
MAINTENANCE
(For information purposes)
3
months
6
months
1 year
2 years

IV
open
o c o

SECOND SECTION
DECATHLON ADVICE :
1/Adjusttheboltand quickfastenermechanism
closed position
IV
open position
open closed
closed
open
of force

Removingorinstallingthe wheelfixingsystem
- open the brake pad (see the Brakes section)
- turn in the quick fastener lever from Closed to Open.
CLOSE
OPEN
OPEN
- correctly position your fork on the
fastener.
CLOSE
SAFETY RING
HUB
NUT
- turn the quick fastener from Open to Closed.
The force should be sufficient to block your wheel.
Warning :
Before use, lift the wheel from the ground and hit the wheel firmly downwards
(front wheel and then back wheel). The wheel should not come away
completely untightened. In case of uncertainty, tighten again.
You should feel strong resistance lowering the quick fastener lever: the wheel is
then properly assembled.
Warning :
It is extremely dangerous to remove or damage the fastener bolt and an
addition
of these two would lead to damage and falls. It may also cancel the
guarantee.

2/ Pedals
Warning :
Avoid hand tightening the pedal, use the proper wrench (15 metric size).
I/ Identify your pedal, look at the letter on your pedal L or R.
2/ The pedal marked R is to the right of your bicycle. Turn it to fix the crank
clockwise
3/ The pedal marked L is to the left of your bicycle. Turn it to fix the crank
anticlockwise.
Left and right
3/ Brake levers and calipers
The brake lever should only be moved a minimum for proper adjustment, the lever
should not touch the upright handlebar during maximum braking.
Brakes are very important!
With V-Brakes, a bent tube for quick fastener should be correctly mounted. With
cantilever brakes, the drop wire for quick fastener should be correctly mounted.
With brake calipers, the quick fastener lever should be closed.
CAUTION :Road: see Shimano or Campagnolo instructions.
There are two types of the braking systems on mountain bikes/town bikes/hybrids:
cantiver and the V-Brake system, and calipers for road bikes
Adjusting brake pads
1/ Check the alignment of the pad with the rim side.
2/ Check the pads are properly centred relative to the wheel.
Be careful to leave 1 mm between the rim and the pad.
L
R

3/ Always move the back of the pad away from the rim
Be careful to leave about 1 mm between the rim and
the pad.
Changing brake pads
Unscrew your pad with an Allen wrench until
he can be removed and carry out the reverse
operation when you change it.
Adjusting the brakes
The operation/ how to use thebrake
When you brake, use only the back brake first and then use slightly and gradually
the front brake. An over load on the front brake lever may result in falling down
forward. Be sure you know how to use your brakes before riding the bike.
I/ Unscrew the pad fixings (see the essential tools section).
2/ Put the pads on the rim and adjust as described Be careful to tighten in the
pad fixing.
3/ Adjust the balancing (positioning) of the calipers if necessary Pads will be
handled differently depending on the type of brake:
manufacturer’s
Tension spring
Mor e tensi on
screwdriver
Less tension
screwdriver
Side pull
+adjustment screw
CANTIVER
TRIANGLE
TRIANGLE NUT
CABLE
NUT
SAFETY HOOK
POSITION
CABLE
ADJUSTMENT
PULL THE CABLE