The DOPPLER crown is one of the only aluminum machined in an aviation-type alloy. This gives it strength and reliability. In addition, with its innovative design, it will provide a racing look to your vehicle.
 This sprocket will be ideal to start again on excellent transmission / chain / sprocket bases! Intended to be mounted on DERBI , APRILIA , GILERA motorcycles
 Width 420, available 53 teeth. To optimize your transmission, we advise you to change the chain as well as the sprocket.
 Mounts on:
 APRILIA RS4 (50cc) from 2011 to 2017
 APRILIA RS4 (50cc)
 DERBI GPR (50cc)
 DERBI SENDA SM DRD EVO (50 cc)
 DERBI SENDA SM DRD RACING (50 cc)
 DERBI SENDA SM X-TREME (50cc) from 2018
 GILERA SMT (50cc) from 2011 to 2017