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Shimano BB-UN300, Square Taper, 68/100mm (Silver)

In stock online (40)
In store: Check availability

Available in store

Bottom bracket, 68mm/110mm.


  • Simple and reliable square taper bottom bracket
  • Replaces both BB-UN26 and BB-UN55
  • Sealed cartridge bearings
  • Cr-Mo axle
  • For bicycles equipped with a chain case, select BB-UN300-K
  • For E-type front derailleur compatibility, choose BB-UN300-E
  • Fixing bolts not included; Shimano FC-E6000 bolts suggested

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