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Shimano BB-UN26 Square Spindle English Threaded Bottom Bracket with a 73mm shell width.
Features:
Specifications:
Frame Interface: BSA/English Threaded
Spindle Interface: Square Taper JIS
Bottom Bracket Shell ID: 1.37
Shell Width: 73mm
Spindle Lengths: 110mm, 113mm
Color: Silver
Weight: 330g