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Spirit of Scout Competition and Fairness


The Pinewood Derby is a competition of scout against scout. Please let your Scout design and build his own car. Please assist your Scout in building their car. Teamwork in building his car can be Fun! Let Scouts be Scouts and race Scouts! Thank you.

Pack 163 Pinewood Derby Regulations

Length, Width and Height

+ Maximum overall width (including wheels and axles) shall not exceed 2 ¾”.

+ Minimum width between wheels shall be 1 ¾” (so car will clear the center guide strip on track).

+ Center guide strip width is 1 5/8” . Do not taper your front end severely or you will lose axle stability

+ Minimum clearance between the bottom of car and track shall be 3/8” (to clear the guide strip).

+ Maximum length shall not exceed 7” (this includes add-ons)

+ Maximum height is 5.5” (Broken Mast rule, sorry Bob McHugh)

+ The wheel base length (distance between the front and rear axles) may be changed. Maximum length is 4 3/8”.

Weight and Appearance

+ Weight shall not exceed 5 ounces. The Post Office will gladly weigh your car. Or your parents might have a postal scale at work. Your car will be weighed on the Official Race Scale and its reading will be considered final. The car may be hollowed-out and built up to the maximum weight by adding wood or metal only. The additional weight must be securely built into or affixed to the car. Weights on the bottom of the car should be recessed (3/8” track clearance required). Weights on top of car do not need to be recessed.

+ Mercury or BB pellets are not allowed as weights.

+ Detailing, such as driver, spoiler, exhaust pipes, decals, painting and exterior extras are permitted provided they still meet the length, width and height requirements.

+ Cars with wet paint or glue will not be accepted.

+ Center Post Start - No “U” shaped front-end bumpers will be allowed. Cars with indented front bumpers can gain up to 1” lead when placed in the staring gate. Please leave ¾” in center of front bumper for fair starting (thanks).

Wheels and Axles

+ Only official Scout Grand Prix wheels are axles are permitted. They are included in your race kit you receive from Pack 163. Hobby Shops sell other similar brands but they are not Official Scout Grand Prix and will not be accepted.

+ Straight Axles are prohibited.

+ Axles may be polished (to remove burrs).

+ Wheel bearings, spacers, washers or bushings are prohibited.

+ Wheels can be sanded (to remove excess plastic burrs). They can not be narrowed or tapered.

+ The car shall not ride on any springs.

+ The car must be freewheeling with no starting device of other propulsion.

+ All four wheels must be in contact with the track. (No three-wheeled cars allowed).


+ Only dry powdered lubricants such as graphite may be used. Regular oils and sprays are not permitted.

+ Cars may be lubricated prior to technical inspection. They may not be lubricated afterwards.

Technical Inspection

+ Each car must be newly crafted for this derby. Cars from previous year’s races are not permitted.

+ Each Derby car must pass a technical inspection by the Grand Prix Inspection Team before it may compete. This is also known as the ‘weigh-in’. The Inspection Team has the right to disqualify any car that does not meet Official BSA race specs. Car owners will be notified of any violations during the weigh-in and will be given the opportunity of modifying their car to meet the race specs. If your car requires modification, there will be a table set up as the “Pit Area” and a “Pit Crew” will be available to make the necessary changes at the weigh-in.

+ After passing the Technical Inspection, the car will be placed in an “Impound” box and numbered. The car may not be touched again by anyone other than the race officials until after the final race or until the car is eliminated during heats.