Shimano UN300 English Bottom Bracket 73 x 113mm

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The quality and performance-oriented Shimano BB-UN300 cartridge bearing bottom bracket features a JIS square taper mount and is designed for frames with BSA thread and 73 mm shell width. A stabilizer ensures a constant chain line.


  • Square Type Bottom Bracket
  • Quality/performance cartridge bearing square bottom bracket
  • Better chainline stability with chain line stabilizer


  • Size: 73 x 113mm


Barcode # 4550170619213
Brand Shimano
Shipping Weight 0.2000kg
Type Bottom Brackets

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