HPI Racing 4792 Vintage Slick Racing Tire D Compound, 31mm, 2-Piece HPI Racing Vintage Racing Slick Tires are molded from D-Compound rubber for high traction and long life on paved surfaces These race-inspired slicks maximize the critical contact patch of the tire and reduce tread squirm for increased grip and lower lap times Sold in pairs; Available in 26mm and 31mm widths Because of the special sidewall construction, these tires must be used on HPI Vintage Wheels