Tire - Sport Force+ RS - Rear - 190/55ZR17 - (75W) Features a specially developed Racing Soft (RS) compound for superb straight-line stability at high speeds, Racing soft compound ensures optimal grip at extreme lean angles at a service temperature of 176°F, Designed for race tracks, ready to be used on public roads, For track use it is using tire warmers for at least 50 min @ 176°F and to follow the hot and cold pressure guidelines until you find pressure combination for your motorcycle, track conditions and riding style., Tested by Randy Krummenacher to deliver lap times on supersports and sport naked motorcycles.