The overall length of the car shall not exceed 7 inches.
The overall width of the car shall not exceed 2.75 inches.
The car must have 1.75 inches clearance between the wheels.
The car must have 3/8 of an inch clearance underneath the body so it does not rub on the track.
Car Weight Rules
The car shall not exceed 5.0 ounces.
The official race scale that is used at car check-in shall be considered final.
Car Modifications
Kits or pre-cut bodies are allowed
You may add additional items (fins, engine, etc) to the body of the car
You may use non-BSA wheels and axles, including graphite coated or polished.
Axles may be bent. Rail riding and 3-wheel configurations are allowed.
No washers, bushings, bearings or springs are allowed.
Only dry lubricants are allowed. No liquid lubricants are allowed.
Weights must be firmly attached and stationary. No moveable weights.
The car must be freewheeling, with no starting devices.
Other Race Rules
It is preferred that all cars racing in this year’s Derby must be new cars constructed specifically for this year’s race. Cars entered in previous races are allowed by discouraged.
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 is allowed to compete.
The Inspection Committee has the responsibility to disqualify those cars that do not meet these rules.
If a car does not pass inspection, the owner will be informed of the reason for failure and given time within the official check-in time to make any adjustments. A car not able to meet specifications will be disqualified.