The Bosch O-ring (BDU3XX) is used to secure the spider/chainring when the locking ring is loose
Compatible with:
BDU3XX
BDU33YY
- Season:
- 2023
- Brand:
- Bosch
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The Bosch O-ring (BDU3XX) is used to secure the spider/chainring when the locking ring is loose
Compatible with:
BDU3XX
BDU33YY
