The Checkers™ industrial wheel chocks, MC3009 for ground vehicles are manufactured with highly durable, lightweight polyurethane and they feature a larger base that makes them ideal for use with heavy equipment. MC3009 wheel chocks are designed for mine support equipment such as lubrication trucks and heavy maintenance vehicles. Rated for tire sizes up to 65 in. (165.1 cm) diameter and gross vehicle operating weight up to 245,000 lbs. (111,130 kg). A maximum rated payload of 70 tons.