Shimano BB-UN300 Square Taper Bottom Bracket

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- All Shimano products sold by us are guaranteed genuine, brand new and fresh stock.
- Installation available in-store (fees apply).

The Shimano BB-UN300 is a cartridge-style JIS square taper bottom bracket for 68mm BSA threaded frames. Available in multiple axle lengths to suit different crankset and chainline requirements.

Model: BB-UN300
Thread Type: BSA
Shell Width: 68mm
Axle Type: JIS Square Taper
Axle Length Options: 113mm, 117.5mm, 118mm, 122.5mm, 127.5mm
Compatibility: JIS square taper cranksets