Shimano BB-UN300 Square Taper Bottom Bracket


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Really. If it's not up to snuff after you use it (a couple times) you can still bring it back. It lasts longer than 30 days, but not forever. We'll be fair about it.


A mountain bike bottom bracket with English threads and square tapering.

  • Spindle is steel
  • Width is 68mm
  • Includes resin left hand adapter

Tech specs

Ideal for
  • Mountain biking
Thread styleBritish
Axle integrationSquare tapered
Shell width68mm
Made inSingapore

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2.5 out of 5 stars with 2 reviews for Shimano BB-UN300 Square Taper Bottom Bracket

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