IRC RX-01 Road Winner Rear Tire (140/70-17) IRC aspires to provide rides with high performance tires for any condition. Their mission is simple: To provide superior and never-ending product development and customer service. Their goal is to be your number one tire partner.Sport bias tire with well-balanced in abrasion resistance and grip.Combines narrow and wide grooves to provide a flexible tread surface for superior road holding and traction on wet roads.RX-01&#39;s strong