Car Length, Width & Clearance
Derby Car Dimension Rules
  1. The overall length of the car shall not exceed 7 inches.
  2. The overall width of the car shall not exceed 2 ¾ inches.
  3. The car must have 1 ¾” clearance between the wheels.
  4. The car must have 3/8” clearance underneath the body so it does not rub on the track.

Derby Car Weight Rules
  • Total weight of the car shall not exceed 5 ounces.
  • The official race scale that is used at car check-in shall be considered final.
Car Modifications Not Allowed
  • The official pine wood block must be used. The block may be shaped in any way that is desired.
  • Official BSA wheels and included axles must be used. The wheels may not be cut, drilled, beveled or rounded. However you may remove the seams and imperfections from the wheels. The axles may be burred, polished and lubricated.
Other Pinewood Derby Race Rules
  • Once a car passes inspection and is entered into the race, only race committee members can touch it.
  • If the car loses a wheel, or is otherwise damaged, the racer shall have 5 minutes to make repairs.
  • Each car must pass inspection by the official inspection committee before it will be allowed to compete.
  • The Inspection Committee has the responsibility to disqualify those cars that do not meet these rules.
  • If you have a question about rules, be sure to ask the Grand-master running the race because they have the final say about what is and isn't legal for that race.