33
BRAKES
WARNING
Risk of accident and injury!
If the bike is fitted with unsuitable or incorrect brake pads, the braking power
can be either too low or too strong or the brake can virtually lose its function
entirely and fail completely.
»
Replace any brake components (e.g., in the event of repairs) with original spare
parts only.
20 Disc brake
4
3
1
2
1
Brake disc
2
Adapter
3
Brake calliper
4
Hydraulic line
Fig. 5:
Disc brake components
20.1
Method of operation
The disc brake creates a braking effect when the brake lever is pulled to decelerate the
brake disc.
The brake disc is decelerated by the brake calliper attached to the fork or chainstay. The
brake calliper contains brake pads that are pressed against both sides of the brake disc when
the brake lever is pulled.
The force is usually transferred hydraulically. Pulling the brake lever increases the pressure
of the brake fluid in the hydraulic line. The brake fluid transfers this pressure to the brake
calliper and presses the brake pads against the brake disc, thereby braking the wheel.
Depending on the model, the braking force can also be transferred mechanically from the
brake lever to the hydraulically controlled brake calliper along a brake cable.
