LEGO® Derby Rules

Car Weight

  • If racing for speed, maximum car weight shall not exceed 5.0 oz
  • For open class racing, weight limit is at the disgression of the Race Manager

LEGO Derby Car Dimensions

  • Max Height: 4.5" - so the car clears the finish gate. (Doesn't apply if using Pinewood Pro's PRO Track)
  • Max Width: 3" - so the car does not interfere with the car in the adjacent lane
  • Max Length: 10" - so the car fits behind the start gate
  • Bottom clearance: 3/8" - so the car doesn't rub on the track center guide rail. (Doesn't apply if using Pinewood Pro's PRO Track)

LEGO Derby Axles and Wheels

  • PRO Brick Wheel Assembly or Mini Brick Wheel Assembly must be used to get precise wheel spacing.
  • All four wheels do not need to be in contact with the track; however, each car must have four wheels.


  • Only oil type lubricants, such as Pinewood Pro's Nyoil, may be used on the axles before the car car is entered into the race.
  • You may not add lubrication once the car is submitted.
  • IMPORTANT! Do not attempt to use graphite on your LEGO axles because graphite will migrate to the LEGO parts and the parts will not longer stick together.

Car Modifications Not Allowed

  • Wheel bearings, washers or bushings are prohibited.
  • The car must not ride on any type of springs.
  • So called "cheater bars" at the front of the car to give an unfair starting advantage are prohibited.
  • No starting or propulsion devices.
  • The car must be freewheeling.

Other LEGO Derby / Mini-Brick Derby Race Rules

  • Each car must pass inspection by the official inspection committee before it will be allowed to compete.
  • Any other modifications not expressly forbidden by any of the rules above, are allowed, subject to final decision by a race official.
  • The Inspection Committee may disqualify any car that does not meet the above specifications.

Car Repairs

  • If pieces fall off the car, (common in LEGO Derby car races!), the racer will have 2 minutes to put pieces back on the car.
  • No additional pieces may be added when the car is repaired.