Shimano UN55 Square Taper Bottom Bracket (Silver) (Italian) (70mm) (107mm)

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Shimano BB-UN55 Square Spindle Italian Bottom Brackets

Note: This listing is for an Italian Threaded Bottom Bracket (36 x 24 w/ 70mm shell). Photo is for reference and may not show correct specifications.


  • Fits JIS Square-Taper Cranksets
  • Hollow spindle
  • Crankarm fixing bolts not included

Frame Interface: Italian Threaded
Spindle Interface: Square Taper JIS
Bottom Bracket Shell ID: 36
Shell Width: 70mm
Spindle Lengths: 107mm, 110mm, 115mm, 118mm, 122.5mm
Color: Silver
Weight: TBD

This product was added to our catalog on February 28, 2020