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Shimano BB-UN300 Bottom Bracket – English, 73 x 123mm Spindle, Square Taper JIS

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Amazon Price: $17.50 (as of March 3, 2024 9:58 am – Details). Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on the Amazon site at the time of purchase will apply to the purchase of this product.
  • Brand: SHIMANO
  • Manufacturer: Shimano


  • Crankarm fixing bolts sold separately
  • Hollow spindle
  • Spindle Interface Type: Square Taper JIS
  • Bottom Bracket Shell I.D.: 1.37

Manufacturer Info

  • PartNumber: EBBUN300C23X