Checkers general-purpose wheel chocks are comprised of two lines, the UC and RC series. Checkers general-purpose, UC series wheel chocks are manufactured with highly durable, lightweight polyurethane. These chocks are ideal for use with over-the-road trucks, trailers, pickups and utility vehicles. For tire diameters 27 in. to 65 in. (68.6 cm to 116.8 cm). Our general-purpose RC series wheel chocks are composed of durable rubber that makes them strong and safe in industrial applications. The RC models are resistant to damage from UV, moisture, salt, and oils. Their traction design grips the tire and road and will not cause tire or pavement damage. The chock design also allows either side to be positioned against the tire. This series of chocks is built to suit a variety of applications in the construction, utility, and other commercial industries.