This is the Lock Ring and O-ring kit to hold the front chainring and/or spider onto the motor drive pinion on the Bosch Gen 3 Active Line, Active Line Plus and Performance Line Drive Units (BDU3XX).
Substantially tougher than the plastic nuts, although be careful not to cross thread the nut on the drive unit assembly.
Included in this kit is the Lock Ring (1270016489) + the compatible O-Ring (1270016107).
Compatibility:
- Active Line (BDU3XX)
- Active Line Plus (BDU3XX)
- Performance Line (BDU3XX)
Please Note: We also sell the Bosch Spider Tool to safely remove and replace this nut. Available from our store.
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