B'Twin Bicycle User Manual - page 5
5
4/ Check that the V-Brake or Cantilever calipers are symmetrical.
Check that the “left and right” caliper return springs are balanced as illustrated below:
5/ Adjusting cable tension
The case of V-Brake or Cantilever or
Roller Brake type brakes.
ALUMINIUM TUBE
SCREWDRIVER LESS
TENSION
TENSION
SPRING
ADJUSTING
SCREW
HANGER
SIDE PULL
CABLE
NUT
PULL THE CABLE
HANGER
BOLT
CABLE
PINCH
BOLT
MORE TENSION
CANTILEVER
RIM
Caliper brakes
(U-type)
PULL THE CABLE
SYMMETRICAL SPACE
SAFETY HOOK
POSITION
The braking device is located inside the hub: the brake can be activated by a lever (drum brake) or by the pedals (coaster brake).
Coaster brake: the brake is activated when you peddle backwards. The brake must be applied before the crank has rotated 60
degrees (1/6 turn). The chain activates the brake. It's important to check that the tension is correct to prevent chain derailment.
The permissible range of vertical movement for the chain is detailed in the "Adjusting chain tension" section.
6/ Disc brake
The brake pads exert pressure on the disc attached to the wheel hub. The intensity of pressure is controlled by a lever linked to the
brake by a cable or hydraulic hose. Do not activate the brake lever when the wheel is not attached to the frame.
To align the disc brake, loosen the brake fixing bolts, then fully tighten the lever and retighten brake fixing bolts to a torque of
Nm12.
Advice on children's bikes
Parents or the responsible adult/s must ensure that children have been properly instructed on how to use the bike and the braking
system, in particular.
C. Guidance on minimum seat height
Town and leisure bike Bike for young children
All terrain bike
Road bike
BMX
The seat can be
adjusted to a
maximum height of
635 mm or above.
The seat can be
adjusted to a height of
between 435 mm and
635 mm.
The seat can be
adjusted to a
maximum height of
635 mm or above.
The seat can be
adjusted to a
maximum height of
635 mm or above.
The seat can be
adjusted to a
maximum height of
435 mm or above.