Schwalbe Ice Spiker Pro Studded Tire Features 402 tungsten carbide tip studs and a tubeless-ready bead Item SpecificationsWeight890gPSI26-54PSITire BeadFoldingISO Diameter622 / road / 29"ISO Width57mmLabeled Size2.25Color Tread/SideBlackTire TypeClincher,Tubeless CompatibleTire Diameter29"Intended UseWinter/StuddedDefined ColorBlack