With a 220 TPI cotton casing and a Kevlar 3-D compound, the Rally is an excellent road training tire.Training tubularCotton 220 tpi casing with Kevlar 3-D compoundNon-removable 36mm presta valveItem SpecificationsWeight300gPSI100-130PSITire BeadFoldingISO Diameter622 / road / 29"ISO Width21mmLabeled Size21Color Tread/SideBlack/BlackTire TypeTubularTire Diameter700cTire UseRoadDefined ColorBlack