This is a set of HPI 2.2" Super Star Truck Wheels, and are intended for use with the HPI Firstorm, Savage XS and Wheely King trucks. These wheels are also compatible with the HPI Rush and MT series stadium trucks. The stylish Super Star 2.2 is made from high impact nylon for durability and crash resistance. The wheels are designed to fit front and rear of 4-wheel drive trucks, as well as the rear of 2-wheel drive trucks and are a great bolt on upgrade for your HPI truck. These wheels include a small parts tree of adapters to fit Associated, Traxxas, Losi and most other 1/10 truck rear axles, as well as a washer to use between the wheel and nut.