Shimano BB-UN300 Bottom Bracket - English 73 x 123mm Spindle Square Taper JIS ModelNumber=D1565 and dynamically extracts debris from

and dynamically extracts debris from the pulley wheel while it’s rotating

Offers wider tire clearance

6 seatpost sizes

15" rate (lbs) 500 color orange

Shimano BB-UN300 Bottom Bracket - English 73 x 123mm Spindle Square Taper JIS ModelNumber=D1565 and dynamically extracts debris fromShimano BB UN300 Bottom Bracket English 73 x 123mm 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 123 Defined Color Black