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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.


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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