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 Performance, Performance CX Gen 2, Performance CX Gen4, Performance Cargo Gen 4 and Active Series* ebike mid-drive motors.
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: For bikes equipped with Active Series motors. This item works only with pre-2018 Active Series (BDU2XX) motors equipped with sprockets with <20 teeth.