The Bosch Gen4 Chainring Lockring - Black delivers secure, precise chainring mounting with OEM reliability in a clean black finish. Official Bosch lockring for Gen4 Performance Line CX & Active Line motors Threaded design clamps chainring firmly to motor spindle High-strength steel construction with corrosion-resistant coating Black oxide finish for durability & stealthy integration Precision-machined threads for exact torque & no slippage Compatible with Bosch Gen4 BDU series (including CX Gen4 & Gen5 variants) Includes integrated O-ring seal to block contamination Easy install with standard Bosch/ ISIS lockring tool You'll love it for its bombproof hold that keeps your chainring locked tight under heavy e-bike torque, exact OEM fit that restores factory performance, and tough black finish that blends seamlessly while standing up to trail abuse. Grab yours now and keep your Gen4 drivetrain dialed!
