Spitfire's 80HD wheels trade the brand's signature Formula Four urethane for a softer 80a compound, built for cruising, bombing hills, and rolling over rough pavement that would stop a standard street wheel cold — a different side of the same urethane expertise Spitfire's built since Jim Thiebaud founded the company in San Francisco back in 1987. The Superwides shape widens the contact patch even further for extra stability at speed, shown here in the team's Multiball graphic at 58mm.