LEGO® Derby Rules

Car Weight

• Maximum car weight shall not exceed 5.0 oz
• The 2x2 Zinc Brick (.44oz) is the best weight for LEGO Derby cars because it can simply be snapped on like any LEGO part
• For open class racing, the 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.
• 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.

LEGO Derby Axles and Wheels

• PRO Brick Wheel Assembly or LEGO Derby Chassis 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

Lubrication is not allowed.

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 Race Rules

• Each car must pass inspection by the official inspection committee before it will be allowed to compete.
• Any 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 5 minutes to put pieces back on the car.
• No additional pieces may be added when the car is repaired.