System requirements

Timing belts drive system for bicycles

The CONTI® DRIVE SYSTEM imposes certain requirements on the bicycle that is supposed to be equipped.

The bicycle frame

Either a lock to open and close the bicycle frame (for example on the seatstay or the dropout) or an elevated chain stay is needed to enable belt fitting. Precise construction and rigidity of the bicycle frame ensure accurate adherence to positional and alignment tolerances.

Belt sprocket alignment

The CONTI® DRIVE SYSTEM offers high tolerances. Nevertheless the system installation and maintenance should consider a correct sprocket alignment and adjustment. The out-of-parallel deviation should not be more than 3 mm and the out-of-true angle should not exceed 0.5°. Deviations beyond these tolerance values could cause noise or lead to an increased wear of the CDS sprockets and the timing belt.

The manual shift

Furthermore – if a manual shift is desired – hub gears must be installed due to the belt’s incompatibility with current chain derailleurs.

Compatible with eBikes

Electric bicycles can also be equipped with the CDS timing belt. The system is compatible with any types of torque sensors and pedelec or eBike motors with a power output of up to 500 Watts. A motor power beyond this 500 Watts standard needs a special approval.

Likewise, the center distance between the sprockets on the bicycle frame should remain stable especially during the ride to ensure a constant belt tension. Belt jumping over sprocket teeth caused by reduced belt tension can therefore be avoided.


Frame lock (depends on bike manufacturer)

Opposite alignment

Opposite alignment

Right: Parallelism error max. 3mm, Left: Any out-of-true angle max. 0.5°

Right: Parallelism error max. 3mm
Left: Any out-of-true angle max. 0.5°