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 is excellent quality for intensive useDesigned for optimal grip and high speedIncorporates Speedgrip compound and racing-specific tread characteristics67 tpi Item SpecificationsWeight628gPSI23-50PSITire BeadFoldingISO Diameter622 / road / 29"ISO Width57mmLabeled Size2.25Color Tread/SideBlackTire TypeClincherTire Diameter29"Intended UseMountainDefined ColorBlack