The Zaffiro is designed with deeper cuts in the middle tread and shallower cuts on the shoulder tread, giving a faster and safer tire when cornering.Aramid Endura 3-D compound treadPRB (Puncture Resistant Belting)26 tpi nylon casingItem SpecificationsWeight240gPSI100-125PSITire BeadSteelISO Diameter622 / road / 29"ISO Width28mmLabeled Size28Color Tread/SideBlack/MithrilTire TypeClincherTire Diameter700cTire UseRoadDefined ColorBlack