Shimano BB-UN300-K Square Taper JIS 68×127.5mm Spindles English Bottom Bracket
Shimano BB-UN300 Square Spindle Bottom BracketsFits JIS square-taper cranksets. Crankarm fixing bolts sold separately. Hollow spindle. For chain case. Item Specifications: BB/Frame Interface, English, Bottom Bracket Shell I.D., 1.37, Spindle Length, 127.5, Spindle Interface Type, Square Taper JIS, BB Shell Width (mm), 68 mm,.