Shimano BB-UN300-K Bottom Bracket - English 68 x 122.5mm Spindle Square Taper JIS For Chain Case MFPN=SOLO-COG-19T-8 - this headset comes as

- this headset comes as standard with a crown race to suit tapered forks

Color Black Flat Protection Sidewall TPI 60 Weight 800 Defined Color Black ISO Width (mm) 61 ISO Diameter 584 / 650b / 27

Extra long body with single lock ring and smooth thumb zone to reduce trigger friction

}Cane Creek Progressive Rate VALT Lightweight Rear Shock Spring - 55mm x 500-610lbs White

Shimano BB-UN300-K Bottom Bracket - English 68 x 122.5mm Spindle Square Taper JIS For Chain Case MFPN=SOLO-COG-19T-8 - this headset comes asShimano BB UN300 K Bottom Bracket English 68 x 122. 5mm Spindle Square Taper JIS For Chain Case. 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 122. 5 Defined Color Black