Bottom Bracket Shimano BB-UN300 BSA 68mm

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  • 117.5mm/68mm
  • 113mm/68mm
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Shimano BB-UN300 BSA 68mm Bottom Bracket

The high-quality and powerful Shimano BB-UN300 bottom bracket has a JIS square mount and is suitable for frames with a BSA thread and a 68mm shell width. A stabilizer ensures a constant chain line.

Shimano BB-UN300 BSA 68mm Bottom Bracket


  • Adapter: aluminum (left), aluminum / steel (right)
  • Shaft: steel
  • For square rods
  • For English threaded bottom bracket shells (BSA)
  • Various sizes available
  • Fast and precise assembly

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