Shimano BB-UN300 Bottom Bracket - English 68 x 107mm Spindle Square Taper JIS MPFN-BCB2 12mm front and rear thru-axles

12mm front and rear thru-axles flat-mount disc brakes

Compound Organic Heat Sink No Backing Plate Material Steel Pad Shape Number 15

6 Tubless Folding Black 60tpi

Advanced moisture absorption

Roam Spoke Kit

Shimano BB-UN300 Bottom Bracket - English 68 x 107mm Spindle Square Taper JIS MPFN-BCB2 12mm front and rear thru-axlesShimano 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 Defined Color Black Bottom Bracket Shell I. D. 1. 37 Spindle Length 107 Spindle Interface Type Square Taper JIS BB Shell Width (mm) 68 BB Frame Interface English