Shimano BB-UN300 Bottom Bracket - English, 73 x 123mm Spindle, Square Taper JIS

Shimano BB-UN300 Square Spindle Bottom Brackets

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

• Spindle Interface Type: Square Taper JIS
• BB Shell Width (mm): 73
• Bottom Bracket Shell I.D.: 1.37
• Spindle Length: 123
• Defined Color: Black
• BB/Frame Interface: English