The Bosch lockring is designed to lock your sprocket onto your Bosch powered electric bike. Installation removal requires the use of the Lock Ring Tooland must be torqued to 20-25 Nm. This high-quality alloy lock ring will securely hold the Bosch chainrings securely in place. After each removal or install it's important that the lock ring O-ring seal be replaced.
Simply select the correct lockring for the Generation of drive you currently on your bike(s).
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Review by Jim K. on 1 Nov 2022review stating Need a spare, could be
Need a spare, could be out of service for a period if the nut is damaged. That castle nut holds my ebike drive together which takes a beating fore sure.
