Shimano UN300-K Square Taper Bottom Bracket Fcolourfamily_Green Built specifically to work with

Built specifically to work with fat tired bikes

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

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

and grime in place

Shimano UN300-K Square Taper Bottom Bracket Fcolourfamily_Green Built specifically to work withShimano 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