Fits Bosch® Active Line (chainrings less than 20 teeth), Performance Line and Performance Line CX models
For lockrings with 50mm outside diameter and 8 notches
Replacement for Bosch® 0275009003 tool
Torque wrench compatible 3/8" square drive
Constructed of 4140 heat treated steel and plated for long life
Precisely machined for a perfect fit, this 8-notch tool removes and installs the lockring that retains front chainrings found on Bosch® Gen 2 e-bike motors after the crank arm is removed.