Schwalbe Rapid Rob TiresThe old Racing Ralph tread on a new mission50 EPI carcass and LiteSkin sidewall|Item SpecificationsTire BeadSteelISO Diameter622 / road / 29"ISO Width54mmLabeled Size2.1Color Tread/SideBlackTire TypeClincherTire Diameter29"Intended UseMountainDefined ColorBlack