The Racing Ralph is the optimal competition tire. The star of the MTB scene is also the optimum choice for cyclocross competition: Evo-carcass and triple compound tread for added grip and speed off-road. New tread pattern and 127 tpi casing for optimal rolling resistance and gripPerformance level which is excellent quality for intensive useDesigned for optimal grip and high speedIncorporates Speedgrip compound and racing-specific tread characteristics67 tpi Item SpecificationsWeight510gPSI30-55PSITire BeadFoldingISO Diameter559 / 26" mtnISO Width53mmLabeled Size2.1Color Tread/SideBlackTire TypeClincherTire Diameter26"Intended UseMountainDefined ColorBlack