LEGO® Derby Rules

Car Weight

• No weight limit

LEGO Derby Car Dimensions

• Max Height: 4.5"
• Max Width: 3"
• Max Length: 10"
• The car must have 3/8" clearance underneath so it does not rub on the track center guide rail.

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.

Lubrication

• Wheels and Axles may be lubricated before the race but lubrication cannot be reapplied during the race or between heats. Excessive powder must be removed before racing.
• IMPORTANT! Keep lubricant AWAY from the LEGO parts! If any lubrication gets on the LEGO parts, they will separate very easily. You might want to consider gluing the critical LEGO parts together after you are happy with your car design.

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 these specifications.

Car Repairs

• If pieces fall of 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.