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Shimano BB-UN54/55 Square Taper Bottom BracketThe Shimano BB-UN54/55 Square Taper bicycle bottom bracket gives you reliable strength for square tapered cranksets.
- Sealed cartridge design offers smooth performance, longer life and less maintenance
- Features a hollow spindle with a plastic cup on the nondrive side
- Spindle Interface Type: Square Taper JIS
- Only compatible with other components using a square taper system
- 73x113mm BB ships with nylon retaining sleeve
Shimano BB-UN54/55 Square Taper Bottom Bracket
- bb - compatibility:
- Shimano Square Taper
- ring material: