Shimano UN300-K Square Taper Bottom Bracket Fcolourfamily_Green Quick change from 2 to

Quick change from 2 to 4 bikes

these are made of high carbon steel and are precision ground

Cylindrical contact area sheds mud better for consistent stepping-in & out

With a maximum weight holding capacity of 100 lbs

Tubeless valves and parts designed after years of experience with ideal and less than ideal rim and tire combinations

Shimano UN300-K Square Taper Bottom Bracket Fcolourfamily_Green Quick change from 2 toShimano UN300 K Square Taper Bottom Bracket SHIMANO Square Type Bottom Bracket MTB Standard Structure SHIMANO quality performance cartridge bearing square bottom bracket Better chainline stability with chain line stabilizer Series: Shimano Tourney TX800 Series Fits JIS square taper cranksets Hollow spindle Crankarm fixing bolts sold separately Adapter material: Aluminum