ganopper 9S 9speed 22 32 44T 170mm Crank Length MTB Mountain Bike Chainset 104BCD 64BCD Easy to Modify Single Crank Set

Shimano UN55 BB Square Taper Bottom Bracket

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

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Product Review

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

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ganopper 9S 9speed 22 32 44T 170mm Crank Length MTB Mountain Bike Chainset 104BCD 64BCD Easy to Modify Single Crank Set