Shimano BB-UN300 Bottom Bracket - English 68 x 107mm Spindle Square Taper JIS Length-38mm The use of liquid sealants

The use of liquid sealants in this tire will void manufacturers warranty

Better brakes mean faster splits thanks to confidence-inspiring brake performance

4 Clincher Wire Black EXO

Generous padding and a short nose for easy on-off transitions

Shimano BB-UN300 Bottom Bracket - English 68 x 107mm Spindle Square Taper JIS Length-38mm The use of liquid sealantsShimano BB UN300 Bottom Bracket English 68 x 107mm 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) 68 Spindle Interface Type Square Taper JIS Spindle Length 107 Defined Color Black