Shimano BB-UN300 Square Spindle Bottom Bracket

Shimano BB-UN300 Square Spindle Bottom Brackets

- Fits JIS square-taper cranksets
- Crankarm fixing bolts sold separately
- Hollow spindle

SPECIFICATIONS
- Spindle Interface Type: Square Taper JIS
- BB Shell Width (mm): 73
- Bottom Bracket Shell I.D.: 1.37
- Spindle Length: 122.5
- BB/Frame Interface: English
- Defined Color: Black