Shimano UN300 Bottom Bracket 68x122.5 | Grey

The Shimano BB-UN300 bottom bracket is mounted on frames with a 68 mm wide BSA bottom bracket. Square axle type with a shaft length of 122.5 mm & 68mm.

Features
- Fits JIS square-taper cranksets
- Crankarm fixing bolts not included
- Hollow spindle

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