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Shimano Bottom Bracket – BB UN300-K (Square Taper, Threaded)


The Shimano BB-UN300-K Square Taper bottom bracket offers quality and smooth performance. It also offers better chain line stability with its chain line stabilizer.

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  • Series: Shimano
  • Type: Square Taper
  • Size: 122.5*68
  • Includes: 0.7mm Spacer
  • Remarks:  w/ Crank arm fixing screws spec. only ** w/ Crank arm fixing screws spec. is available *** w/ 0.7mm spacer
  • Material: Aluminum
  • For Chain Case


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