Shimano BB-UN300 Bottom Bracket - English 68 x 122.5mm Spindle Square Taper JIS 47.5mm Chainline CheckoutTitle=FOX Tooling Kit - Custom Spanner Socket Bar Clamp Diameter (mm) 21

Bar Clamp Diameter (mm) 21

model Drop-Stop ST Direct Mount chainring ring type HG+ (anti-chain drop) mount Shimano DM teeth 28 oval/round round color black

Knurled surface and extra pins for improved traction

All the key functionality features of high end 1x derailleurs are built in

Shimano BB-UN300 Bottom Bracket - English 68 x 122.5mm Spindle Square Taper JIS 47.5mm Chainline CheckoutTitle=FOX Tooling Kit - Custom Spanner Socket Bar Clamp Diameter (mm) 21Shimano BB UN300 Bottom Bracket English 68 x 122. 5mm Spindle Square Taper JIS 47. 5mm Chainline. 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