Shimano BB-UN55 Square Spindle Bottom Brackets
- Fits JIS Square-Taper Cranksets
- Hollow spindle
- Crankarm fixing bolts not included
- Spindle Length: 113
- BB Shell Width (mm): 68 mm
- BB/Frame Interface: English
- Bottom Bracket Shell I.D.: 1.37
- Defined Color List: Silver
- Weight: 330 g
- Spindle Interface Type: Square Taper JIS
