Shimano BB-UN300 Bottom Bracket - English 73 x 118mm Spindle Square Taper JIS MFPN=00.4118.421.058 Swinging hinge design saves space

Swinging hinge design saves space when not in use

Welded seams at cuff and hem for maximum comfort

As a folding tire it really saves weight on the bike

} for BB30/86/92 Sram GXP with O 22 mm made of CrMo steel

Unique groundbreaking design integrated with SRAMs medal winning carbon crank design

Shimano BB-UN300 Bottom Bracket - English 73 x 118mm Spindle Square Taper JIS MFPN=00.4118.421.058 Swinging hinge design saves spaceShimano BB UN300 Bottom Bracket English 73 x 118mm Spindle Square Taper JIS. Shimano BB UN300 Square Spindle Bottom BracketsFits JIS square taper cranksets Crankarm fixing bolts sold separately Hollow spindle TECH SPECS Bottom Bracket Shell I. D. 1. 37 BB Frame Interface English BB Shell Width (mm) 73 Spindle Interface Type Square Taper JIS Spindle Length 118 Defined Color Black