Shimano UN300-K Square Taper Bottom Bracket Fcolourfamily_Green AIR RELEASE BUTTON for precise

AIR RELEASE BUTTON for precise pressure tuning

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

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

Quick change from 2 to 4 bikes

Shimano UN300-K Square Taper Bottom Bracket Fcolourfamily_Green AIR RELEASE BUTTON for preciseShimano 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