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

Quick change from 2 to 4 bikes

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

and grime in place

these are made of high carbon steel and are precision ground

Built specifically to work with fat tired bikes

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