Genuine Bosch O-ring (BDU4XX)


This o ring is required for BDU4xx motors when removing the chainring. It’s suitable for use with 1270014085 lock ring available to purchase separately if required.

11 in stock


For securing the spider/chainring when the lock ring is loose in combination with lock ring

Product line compatibility

Perform. Line Speed (BDU4XX)
Perf/Cargo/CX/Speed (BDU4XX)

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