Pinewood Derby Rules (2016-2017)

Car Dimension Rules

  • The overall length of the car shall not exceed 7 inches.
  • The overall width of the car shall not exceed 2 ¾ inches.
  • The car must have 1 ¾” clearance between the wheels.
  • The car must have 3/8” clearance underneath the body so it does not rub on the track.

Weight and Appearance

  • Weight shall not exceed 5.00 ounces (141.75 grams).
  • The readings of the official race scale will be considered final.
  • The car may be hollowed out and built up to the maximum weight by the addition of wood or metal only, provided it is built into the body and/or firmly affixed to it.

  • Weights cannot be taped to the car.

  • No loose or moving materials of any kind, including mercury, are permitted in or on the car.

  • Details such as steering wheel, driver, spoiler, decals, painting, interior details, etc., are permissible as long as these details do not cause the car to exceed the maximum length, width, and weight specifications.

  • Cars with wet paint will not be accepted.

Wheels and Axles

  • Official BSA wheels must be used. The wheels may not be cut, drilled, beveled or rounded. You may remove the seams and imperfections from the wheels.
  • Only official Scout Grand Prix wheels and axles can be used.  Axles may be polished, but may not be grooved.  Axle diameter may not be decreased.

  • Wheels may be lightly sanded to remove mold imperfections and flashings.  This light sanding is the only wheel modification allowed.  NO material may be removed from the wheel, this includes removal of the step from either end of the wheel bore, or outer hub face, or removing material from the wall of the wheel for “balancing”.  Beveling, tapering, sanding, wafering, rounding, lathe truing, reducing diameter, narrowing, thinning, etc., is prohibited.  NOTE:  Illegal wheels, purchased or modified, are the #1 cause for disqualification.

    For clarification:

    • i.  Wheel diameter may not be reduced below 1.170 inches

    • ii.  Wheel width may not be reduced beyond 0.360 inches

  • Wheel bearings, washers or bushings are prohibited and the car shall not ride on any type of springs.

  • The car must be free-wheeling with no starting device or other propulsion.

  • Distance between front and rear axles must be maintained at 4 ½ inch spacing (See 1.e.ii).

  • The car must have four wheels, free spinning on axles, in the normal position, with axles installed in the precut slots, but it is not required that all four wheels contact the track.

  • Axles may be bent or angled in the slot to adjust steering, angle a wheel or to raise a wheel from touching, however, the axles must be in the slot.

  • The axles, including the tip, must be visible to the inspector.  Any glue or epoxy in the slot must be transparent.


  • Only dry lubricants, such as powdered graphite, may be used.  Krytox, XOil, Nyoil, and similar liquid lubricants are NOT allowed.  Car must have visible evidence of dry lubricant application.  Regular oils or silicone sprays may soften the plastic wheel or damage the track and are prohibited.

  • Powdered graphite will be permitted only in the Pit Stop Area inside the derby location.

  • Cars may be lubricated in the Pit Stop Area before inspection.  No further lubrication will be permitted.

Car Modifications Not Allowed

  • The official pine wood block must be used. The block may be shaped in any way that is desired.

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.

Derby Race Rules — Open Class

  • Rules are the same as the Scout Class, with the following exceptions:
    • Weight shall not exceed 1 pound (16 ounces)
    • No spikes are allowed

November Pack 28 Meeting Reminder

This month’s Pack 28 meeting will be on November 29th at Fairmount. We are doing uniform inspections. If the Scout’s Class A uniform is up to date, he will receive a free pinewood derby car kit! In addition, please remember that we will be collecting new unwrapped toys at the Nov. meeting for Toys for Tots collection drive. See you there!

October Pack 28 Meeting Reminder

Don’t forget that this month’s Pack 28 meeting will be on Tuesday, October 25th at the Fairmount cafeteria. The meeting begins at 7pm. See you there!

Pack 28 Campout September 16-18

This coming weekend is the Pack 28 Campout, which will be at Pere Marquette State Park. Look out for an email from our Cubmaster Mr. Patterson for details, or reach out to your respective Den leaders. See you there!

Pack 28 Hike: June 26

The next Pack 28 hike will be at Bangert Island (1624 Old South River Rd, St Charles, MO 63303). Please RSVP with Mr. Layton at by 6/24 if you plan to attend. See you there!

Candlelight Vigil June 15th

Fairmount elementary has lost 2 children in a tragic event. There will be a candlelight vigil held in their honor this Wednesday, June 15th at 7pm.

If you would like to attend, please contact Cubmaster Jeremy Patterson

Pack 28 Campout–this weekend!

The Pack 28 campout is coming this weekend from May 13-15 at Pere Marquette State Park. Look out for an email from Mr. Meurer as well as your Den Leader for more information. See everyone there!

Pack 28 Meeting–April 26

Tuesday, April 26th (7pm) is the next Pack 28 meeting. Don’t forget that it is Rain Gutter Regatta night…have your Scout bring their boat. See you there!

Clean Stream this Saturday – April 16

Project Clean Stream is coming this Saturday, April 16th! Meet at the Rec-Plex parking lot at 8am, and expect the event to go until at least 11am. We encourage you to dress in clothes and shoes that will get dirty. Talk to your Den Leader if you have any questions. See you bright and early on Saturday!

Save the Date: Project Clean Stream

Save the date! Project Clean Stream is coming on April 16th! Details coming soon…

Older posts «