2020 Pinewood Derby Schedule and Race rules info

Car Impound – Date, Time, Location Instructions:
Date & Time:              Wednesday, March 4th from 6pm – 8pm.

Location:                    Scout Hall, 30 Mountain View Ave

Held during our regular scheduled Pack meeting.


  • Please ensure that your car has been completed, is fully prepared for racing, and that it conforms to the rules & regulations before bringing it in for impound.
  • Be sure to specify that you are impounding your vehicle for Pack 34 just in case other volunteers are assisting or packs are impounding at that location.
  • Paint must be dry, graphite must be applied, the wheel’s set correctly, dimensions within limits, and weight must be within the 5oz. restriction.
  • Please ensure that your scout has a name picked-out before arriving at impound as we will need it for the racing software… plus it’s just plain cool to name such an awesome creation!
  • If a car does not conform to the Racing Rules it will be rejected at impound and not allowed to race
  • Once a car has been officially impounded it cannot be accessed until after the racing has concluded the following day
  • Your car must be impounded within the timeframe specified above and no cars will be inspected or accepted on the day of the race.

Race Day – Date, Time, Location Instructions:
Date & Time:              Sunday, March 8th from 12:00-2:00pm.

Location:                     Scout Hall, 30 Mountain View Ave


  • Sign’s will be up showing where the racing will take place (hint… it’s in the main gym/auditorium area)
  • All Scouts and Leaders should be in uniform, with neckerchiefs on and shirts tucked in.
  • Our Scouts have worked hard for this event and everyone loves to have a crowd see them race so please do your best to stay for the entirety of Pack 34’s racing time slot.
  • The track can be tricky and we don’t want to have anyone jumping over the track, tripping on cables, etc., so please keep all Scouts and siblings away from the track, behind any barrier lines and away from electronic equipment.
  • Root for your favorite car and have fun!

Race Rules Reminder:

Racing rules for this year’s event are as follows:

  • No Car Recycling: The car must have been made for this year’s race.
  • No Prebuilt Cars: The whole point it to build it.  You can buy prebuilt cars on the internet.  Please do not.
  • Weight:
    • Car’s must not exceed 5.0 ounces on a scale accurate to 1/10th of an ounce.
  • Dimensions:
    • Width – Width between the wheels not to exceed 2 ¾ inches
    • Length – The derby cars are to measure 7 inches. Your car can be shorter, but please know that it will likely slow your car down. Cars cannot exceed 7″
    • Height – Not to exceed 4 inches
  • Clearance:
    • Center Rail Width: Must clear center guide rails, typically no less than 1-3/4 inches minimum.
    • Bottom:  No less than 3/8 inches from track surface between center rails.
  • Body Design:
    • Front of the car must be a minimum of ½” wide, centered, and no more than 1” off the track because the start system of the track consists of the cars resting on a slope against a pin. No part of the car can extend past the starting pin.
  • If you choose to push the boundaries and try to get “creative” please be aware of the following:
    • Materials: Only the official BSA kit blocks, wheels, and axles may be used.  One complete kit will be provided at a pack meeting in January.  Replacement kits and wheels can be purchased at the Trading Post in San Rafael.  Again, only official BSA kits/parts may be used.  Please, do not purchase prebuilt or pre-cut cars or “aftermarket” parts such as wheels or axles.
    • Axels:  Pre-cut axle slots MUST be used and not modified in any way.  Only official BSA Nail type axles may be used. Axle nails may not be bent or grooved or in any way altered. Axle sanding or polishing is permitted.
    • Wheels:  Use only Official BSA wheels. All lettering/numbering, both inside and outside, must remain complete and be visible. The fluting and other BSA markings on the outside wheel area must remain visible.  Outer wheel surface may be lightly sanded, shaved, or polished to remove surface imperfections and mold casting burrs, but must not be reshaped in any way in an attempt to lighten the wheel, minimize tread contact or alter aerodynamics. Tread surface must be flat and parallel to the wheel bore. Coning the hubs and truing the inside tread edge is allowed. Tread width may not be less than 7.5 mm.
  • Key Rules of Note:
    • No bearings of any kind may be used
    • Wheels cannot be painted, lacquered or modified in any way
    • Wheels cannot extend beyond either the front or back of the car body
    • All four wheels must be in contact with the flat surface when rolled on a flat surface
  • Prohibited Modifications:
    • Rounding of tread surface/wheel edges
    • Grooving, H-cutting or V-cutting
    • Altering of the wheel profile
    • Narrowing the tread surface, other than truing inside tread edge
    • Drilling sidewalls
    • Hollowing, sanding, or otherwise removing or modifying material from inside the wheel
    • Filling of any wheel surface with any type of material
    • “After Market” wheels are usually lightened in a way that violates these rules.
  • Prohibited Items:
    • Springs
    • Starting devices or propellants
    • Electronic or lighting devices that interfere with race electronics.
    • Liquids, wet paint, oil, sticky substance, or powders of any kind (other than axle lubrication)
    • Glass or excessively fragile parts
    • Bearings, bushings, washers, sleeves, hubcaps or inserts attached to or in contact with the axle, body or wheels.
    • Loose objects on car
    • Magnets
    • Motors

Racing Format:

Racing will occur by Den, and in the following order: Tigers, Wolves, Bears, Webelos 1, Webelos 2, with one winner out of each age group.  This will be followed by an open race targeted primarily at siblings.  Open race cars must still conform to all of the above rules and be checked in on Saturday.

Each car will race in four heats – one on each of the four lanes of the track. Of the four heats, the worst time is dropped and the winner is the car with the fastest average time for its three best heats, measured in elapsed seconds. The five Den winners qualify to race in the Marin Council Meet, which annually is held on the first day of the Marin County Fair. The five Den Winners will be impounded at the close of our races, in accordance with Marin Council rules, in order to qualify to run at the Council Meet.


Funny, unique designs are encouraged.  There will be special design prizes awarded irrespective of car performance.  Cars can be accessorized with almost any kind of item provided the completed car meets all the rules, which are listed above.