Raith Regulator Rubber Race Tires85mm Diameter, 74mm wide, solid rubber race tires with precision rims. Here at Raith, we settle for nothing less than the absolute best. Warren G knows its too. Its with great pleasure that we announce the release of our first rubber race tire. With an outer diameter of 85mm, width of 74mm these solid rubber race tires produce close to double the amount of available grip as a urethane wheel of similar dimensions. Coupled with a precision CNC rim that