Racing tire model, Summer weather traction, High speed controllability Toyo Proxes R888 Tires The Toyo Proxes R888 is a performance and high performance, summer tire made for racing vehicles. The tire features a strengthened high speed durability. The special construction and the R-compound work together to enable the tire's secure high speed performance. This structure allows the tire to safely perform at high speeds, without allowing the tire to maintain its ideal shape under the high speed pressure. This allows the tire to perform at its high speed capability, without harming the tire's construction.