WIDTH: Overall width of the car, including wheels, shall not exceed two and 3/4 inches (2.75"). The body width where the axles attach to the wheels shall not be less than one and 3/4 inches (1.75").

LENGTH: Overall car length may not exceed seven inches (7.00"). The kits often supply wood blanks longer than 7 inches.

HEIGHT: Overall car height may not exceed three inches (3.00"). This prevents tall cars from crashing into the finish line and electronic lane judge.

WEIGHT: Total weight of the car shall not exceed five (5.000 oz) ounces. (Verified by certified scale)

WHEELS: Only official Boy Scout Grand Prix racing wheels are allowed. All four (4) wheels must be used. Wheels must be attached so that there is a minimum of .375" (3/8") between the car bottom and the rolling surface to provide track lane-guide clearance. Color wheels (Red, Orange, Yellow, Green, Blue, Purple, Pink, Glow-In-The-Dark, and the original Black) are all legal wheels as long as they are the official "BSA PINEWOOD DERBY" wheels.

AXLES: Only official BSA Grand Prix Pinewood Derby metal "nail" type axles are permitted. Axles may be polished and lubricated but the use of wheel bearings, washers or bushings is strictly prohibited. Paper label 'hubcaps' may be used but the head ends of the axles must be made available for judging when requested.  Precision machined axles, notched axles, and axles of alternative metals (like stainless steel) are not permitted.

LUBRICANTS. Only dry lubricants such as graphite, graphite with Molybdenum, or BSA "AXLE LUBE" are allowed. Oils or other wet lubricants are not permitted.

SPRINGS: The car shall not ride on any type of spring or other suspension.

PROPULSION: The car must be freewheeling and may not contain any type of auxiliary propulsion or utilize any type of starting device. (No jets, rubber bands, magnets, hooks, adhesives, springs, motors etc.)

DECORATIVE DETAILS may be added provided they do not exceed the maximum weight and dimensions for the car. (Decals, trim, characters and decorations are allowed if they meet the finished car size and weight rules.)

NO LOOSE MATERIALS: The car may be hollowed-out and built up to the maximum weight by the addition of wood or metal. Any additional materials must be securely built into the body or chassis. Mercury shall not be used for weight addition or other construction purposes as it is a health hazard.

MATERIALS: Cars must be built using the BSA Grand Prix Pinewood Derby Series Car Kits. Additional metal must be used only for weight addition or decoration. Axles must be mounted into the wood body. No portion of other kits will be allowed except for decorative purposes. Structural strength is gained only from the wood body. No metal frames or metal axle support is permitted. No 3D printed full body skins or covers are allowed on the vehicle.