Toyo PROXES R888 Racing Radial Tire - 205/50R15 86W Stiffer bead construction and wider tread width generates more cornering force, with less heat degradation. Spiral wound cap ply (construction may vary by size). Semi-slick shoulder area improves steering response. Steel wire reinforced sidewalls (construction may vary by size). Continuous center contact increases braking performance and feel when compared to the Proxes RA1. Tread depth can be shaved to maximize dry traction.