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Shimano BBUN300 73mm Shell Bottom Bracket

Size

BB-UN300

SHIMANO - Square Type Bottom Bracket - MTB - Standard Structure

Square Type Bottom Bracket

  • SHIMANO quality/performance cartridge bearing square bottom bracket
  • Better chainline stability with chain line stabilizer
  • 3 structures available
  • Standard, E-type, chain case options
  • Adapter material: Aluminum
 

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