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. Due to their high performance and high rigidity, the GS-23s are original equipment on the Suzuki VL800 Volusia (Boulevard C50, C50T), and VZ800 (Boulevard M50). Sold individually. Tire Specifications: Load / speed index: 77H. Construction: Tubeless. Overall diameter (mm): 649. Tread width (mm): 170. Standard rim (inches): MT4.00.