The Bosch lock ring tool also referred to as the Bosch Spider Tool is designed for removing and mounting the aluminum lock ring that holds the chainring in place on all Generation 2 (BDU 2XX) Active, Performance and Performance CX drive units.
Simply attach the Bosch Lock Ring Tool using a 1/2" ratchet to quickly remove and re-tighten the lock ring in place and to prevent damage.
The Bosch Lock Ring Tool is a must-have for those owners of electric bicycles equipped with the Bosch mid-drive motors.
For more information, contact one of our electric bicycle experts today who can answer any questions about the Bosch Lock Ring Tool.
*Note: (Not compatible with BDU 3XX and BDU 4XX drive units)
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No, this tool is for Gen2 drive units that use the small chainrings.
The tool you need can be found here: scooteretti.com/products/bosch-gen-4-locknut-tool
This will work for Gen3 and Gen4 Drives.
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