Pinewood Derby Car Rules

Pack 249 Rules for Building Your Pinewood Derby Car 

Download the rules in PDF here.

The Pinewood Derby cars were passed out to Den Leaders at the November Pack meeting. If you have not yet received your car, please contact your Den Leader.
 
Pack 249 subscribes to rules for the building of Pinewood Derby cars and how they are raced. It is extremely important that the rules are followed so that a car is not disqualified. Please read the rules BEFORE making the car.
 

The Rules 

THE KIT:
Cars must be built using the official "Cub Scout Grand Prix Pinewood Derby Car Kit" provided by the Pack. All cars must comply with the racing and building instructions furnished with the Official kit, B.S.A. Catalog # WW17006. Pinewood Derby Kit 7611, “Big Rig Kit”, is not allowed.  The Kit is a one piece car body with plated nails for wheels, and wide tread wheels. Unofficial kits will not be accepted. The "PineCar" Pre Cut Design bodies WILL NOT be allowed.  Additional metal may be for weight addition. Axles must be mounted into wood. 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.
 
CONSTRUCTION DATE:
Cars built and raced in a previous year cannot be used.
 
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"). The minimum width of the front of the car is 1/4 inch (.25").

LENGTH:
Overall car length may not exceed seven inches (7.00"). The kits often supply wood blanks slightly longer than 7 inches.
 
HEIGHT:
Overall car height may not exceed three and 1/2  inches (3.5").
 
WEIGHT:
Total weight of the car shall not exceed 5 ounces (141.7 grams). This will be verified when the car is registered. IMPORTANT: The official weigh-in scale owned by the Pack is the FINAL weigh-in scale. Scales differ from one to the next. The only way to be truly fair to everyone is for all cars to weigh in on the same scale.

WHEELS:
Only official Grand Prix racing wheels provided in any of the Pinewood Derby Series Kits are allowed. All 4 wheels must be used. Wheel treatment (hub and tread smoothing and polishing) may not result in substantial removal of mass nor in reducing the tread (track contact) width from the original kit wheels. Wheel tread surface must be cylindrical. Altering the original wheel shape by sanding it to a point is not permitted. Outside wheel diameter should be no less than 1.180". Ready-made modified wheels are not allowed. 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. It must be obvious to the judges that the wheels and the nails from the kit are being used, and that they have not been altered.
 
AXLES:
Only metal "nail" type axles provided in BSA Grand Prix Pinewood Derby Kits are allowed. All specifications listed in the kits (as to height of axles for track clearance) must be followed. Axles may be lubricated but the use of wheel bearings, washers or bushings is strictly prohibited. Hub caps may be used but the head ends of the axles must be available for inspection. The pre-drilled axle slots on the cars do not have to be used (axles may be placed elsewhere on the car body), but all other axle rules still apply.
 
LUBRICANTS:
Any dry lubricant such as graphite or BSA "Axle Lube" is allowed. Oils and other wet lubricants and are not permitted.
 
SUSPENSION:
The car shall not ride on any type of spring or other suspension.
 
ATTACHMENTS:
The car must be free wheeling and must not contain any type of auxiliary propulsion or starting device. (No jets, rubber bands, magnets, adhesives, springs, motors etc.)
 
DECORATIVE DETAILS
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 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 potential health hazard.
 
AWARDS
 
1st, 2nd, and 3rd place ribbons will be awarded at each Rank level (Tigers, Wolves, Bears, and Webelos) for the fastest car.  Additionally, a Grand Prize trophy will be awarded to the fastest car overall in the Pack.
 
1st, 2nd, and 3rd place ribbons will be awarded at each Rank level (Tigers, Wolves, Bears, and Webelos) for the car chosen by the other Scouts for Best Design.  Additionally, a Grand Prize trophy will be awarded to the Scout’s Choice favorite car overall in the Pack.