Bosch Lock Ring

The Bosch lock ring part # 1270016428 is designed to lock your sprocket onto your Bosch powered electric bike. Installation removal requires the use of the Lock Ring Tool and 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.

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