Body, Wheels, Axles
1. The car must be constructed using the materials supplied with regulation Grand Prix Kit #17006 or Kit #17000.

2. Wheels: Wheels must be obtained and used from Official Pinewood Derby Car Kits #17006 or #17000 or Official Pinewood Derby Wheels and Axles #17553 thru #17557. No modification of wheels will be allowed, except that burrs or excess plastic from the factory molding process (if any) may be removed or sanded. Wheels must be original width thickness and height and the tread surface must remain flat so that the whole tire surface can simultaneously meet the track surface. Tapering or coning of the outside surface of the wheel hub is allowed. Wheels may not be shaved. Just like any real race car, all four wheels should meet the track surface. If the flat surface of the tire is to be sanded, be careful not to round the corners (crown) or the wheel. Any rounding of the crowns will result in disqualification. An edge should still be present. See illustration below. The axle bore of the wheel may not be bushed, sleeved, lined, or otherwise modified to change the basic wheel-to-metal axle interface other than the application of a dry non-permanent spray-on, brushed-on, or dusted lubrication compound. Bushings, sleeves, permanent coatings, thrust washers, and enclosed axles (hub caps) are prohibited. 

3. Axles: Axles must be those supplied in regulation kit #17006 or BSA Official Replacement kit, sold separately. Axles must be obtained directly from Official Pinewood Derby Car Kits #17006 or #17000 or Official Pinewood Derby Wheels and Axles #17553 thru #17557. Burrs on the underside of the axle head and ridges on the axle shaft (if any) may be removed. If the underside of axle head is to be tapered, be careful not to reduce the diameter of the axle head. Polishing of the axle shaft is allowed. The mating surface of the axle may not be bushed, sleeved, or lined. Only a dry non-permanent spray-on, brushed-on, or dusted lubrication compound is allowed. Bushings, sleeves, permanent coatings, thrust washers, and enclosed axles (hub caps) are prohibited. Axles must be mounted on the car body so that wheels are directly opposite of one another.

4. Suspension: The car shall have a solid suspension consisting of the wheels and axles rigidly mounted to the car body. No springs, linkages, shock absorbing materials or other constructions which provide a non-rigid or floating-type suspension are permitted. 

5. Details: Details such as steering wheel, windshield, driver, exhaust pipes, trim, etc., are permitted as long as they are rigidly mounted to the car body and do not exceed the overall car specifications. 

6. Starting Devices: The car may not incorporate any devices which may assist starting. These shall include, but are not be limited to, magnets, liquids, spring mechanisms, etc. There shall be no loose components within the body of the car. The car must also be freewheeling. 

7. Front Edge: The front edge of the car must rest against the starting peg on the track so that the entire car is behind the peg.