500 x 5 kit with magnesium wheel, aluminum brakes. Static capacity, 1,260#, limit load 4550-lbs. Weight per kit 10.80 lbs. Brake rating in kinetic energy capacity 117,500 ft-lb. Each kit contains 2: CWB40-78B wheel assemblies which include 2: CWB164-117 discs, and 2: CWB30-9 brake assemblies with 4: CWB66-106 lining. Chrome discs available by ordering CWB199-102C. Other kit items the same. Use AX5 – 1-1/4″ axles, 2- A484 spaces per axle and MS21025-20 nuts. NOT compatible with SALT.