No vehicles larger than a 1/2 ton pickup. If running a full sized vehicle you need to run a tube in the right front tire. No convertibles. Sunroof must be cover securely with metal. All glass must be removed from the body except the windshield, that is optional. If windshield is removed, must have front bars and screen to protect driver (and passenger) from debris. All cars must have working seatbelts. Driver and passenger must wear seatbelts, long sleeve shirt and long pants. Front bumper may have 1 loop from frame rail to frame rail, but no bigger than 2in tubing allowed. NO SHARP EDGES.