Shimano BB-UN300 Bottom Bracket, JIS

Size: 107mm
Sale price$18.00


Good quality bottom bracket that helps provide the optimal chainline for the Wabi crankset.

Shimano's core square tape bottom bracket provides good all-around value and quality. Features a hollow spindle. Fixing bolts not included.

In general, we recommend the 107mm as a replacement for current Wabis. 110mm is recommended if you are going to 50T chainrings or larger or you are looking for a standalone option for the Wabi crankset for other frames.

  • Spindle length: 107 or 110mm
  • Taper type: JIS 
  • Material: Steel
  • Bearing Type: Sealed 
  • Weight: 301g
  • Threading: English
Recommended Tools:

Square taper crank puller: Park Tool CCP-22

Bottom bracket removal tool: Park Tool BBT-22


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