Belt tension

Belt Drive

Belt tension

Belt tension



Insufficient tension in the timing belt can cause it to jump. When jumping occurs, the teeth of the timing belt slide over the sprocket and the rider feels a “slipping sensation”. Jumping poses a risk of injury.

If the pre-tension of the timing belt is too high, this can lead to increased wear and tear on the components due to overstressing. Damage to the bottom bracket, as well as to the rear wheel hub bracket, can result.
 
Optimum belt tension is in the range of 75 N – 100 N. This corresponds to a maximum sag of 25 mm for the timing belt when a central, vertical load of 5 kg is placed on the upper section of the belt.