HPI Racing 102994 Vintage Performance Tire D Compound, 31mm (2) HPI Racing Vintage Performance Tires are molded from D-Compound rubber for high traction and long life on paved surfaces This tire has low profile tread blocks that give them performance characteristics that bridge the gap between a slick tire and typical treaded tire Sold in pairs; Available in 26mm and 31mm widths; Because of the special sidewall construction, these tires must be used on HPI Vintage Wheels