Active Line Lock ring for mounting the chain ring. O-ring seal 1270.016.107 additionally required. Fits the Bosch Active Line, Performance Line, Performance Line CX electric bike system.
User’s Manuals for Bosch Electric Bike Motor Systems
Bosch Performance Line User’s Manual
Bosch Performance Line Speed User’s Manual
Bosch Active Line BDU2XX User’s Manual
Bosch Active Line BDU3XX User’s Manual
Bosch Active Line Plus User’s Manual