Shimano UN55 BB Square Taper Bottom Bracket;
Shimano UN55 BB Square Taper Bottom Bracket

The Shimano BB-UN54/55 Square Taper bicycle bottom bracket gives you reliable strength for square tapered cranksets.

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The Shimano BB-UN54/55 Square Taper bicycle bottom bracket gives you reliable strength for square tapered cranksets.

  • Bottom Bracket Fit - 68mm BSA of ENG
  • Sealed cartridge bearings
  • Bottom Bracket Fit - 68mm BSA of ENG
  • Sealed cartridge bearings

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