Demolition Derby Rules and Regulations

Please read this in conjunction with the Speedway New Zealand Demolition Derby Rules. We have added a little more information (in Italics) to the rules to clarify questions we have had at previous Derby’s to help you along the way. It is important to note that once scruitineered all derby cars will be quarantined with no access for drivers as further "working on" or "tinkering" is not permitted during the meeting. 


D1-2-5 Competitors must have proof from the issuing authority that they have held at least a Restricted Civil Drivers Licence or SNZ Race Licence. Full civil drivers licence is not required.

D1-1     Demolition Derby Minimum Vehicle Specifications

D1-1-1 Only standard road cars eligible. NO 4-wheel drives, NO SUV’s, NO Ute’s, No Vans
(you can’t remove the axle from an all wheel drive to make it 2 wheel drive)

D1-1-2 No modifications or reinforcing permitted except the following

D1-1-3 All Glass including external mirrors to be removed from vehicle.
Any glass or sharp object left on the track will slice Saloon or Stockcars tyres.

D1-1-4 Tow bar to be removed.
Not just cut off

D1-1-5 All badges, interior and exterior trim and plastic to be removed
Bits of smashed badges will slice race tyres. In the unlikely event your car catches on fire you don’t need any interior trim and plastic adding to the problem. Dash can be left in place

D1-1-6 Both front doors to be securely chained, bolted or welded shut.
Bonnet and boot can be chained or bolted shut if the latches don’t work. We prefer you to chain the doors as some people are not the best welders and if your door opens it’s the end of your race. If the Ambulance crew need to get to you it is easier to remove a chain to open the doors.

D1-1-7 Pillar less cars must have the seam between front and rear doors fully welded
Sunroof must be covered with steel adequately fixed in place

D1-1-8 Full harness seat belt (4-5 point) to be fitted to driver’s seat and securely mounted.
Two standard car seatbelts crossed over are NOT acceptable

D1-1-9 Seat belts must not be mounted to the roof.
The shoulder belts need to be mounted slightly lower than your shoulders, so they hold you in the event of a roll over. The shoulder belts need to be as short as possible, attaching them to the back floor or parcel shelf is NOT acceptable.

All snap in type belt mounts must have a pin to lock the keeper. It could be a split pin or a piece of wire as long as it can’t fall out. All wrap around belts must be fitted as per the following diagram.

All snap in type belt mounts must have a pin to lock the keeper. It could be a split pin or a piece of wire as long as it can’t fall out. All wrap around belts must be fitted as per the following diagram.

D1-1-10 No Retractable seatbelts allowed

D1-1-11 A maximum of 18 litres of petrol to be carried in the tank
A little hard to check but don’t over fill your tank, remember even if you win you car might only need to run for 30minutes and if your tank is leaking fuel you will be removed.

D1-1-12 All cars to be fitted with roll bar (NOT ROLL CAGE)
Consisting of one bar of minimum diameter of 38mm OD x 3.2mm, of steam pipe or RHS, to extend  vertically from floor immediately behind driver’s seat to the roof. Must be touching the seat A 300mm length of pipe or RHS (of the same size as the roll bar), or a 300mm x 300mm x 6mm plate must be welded to each end of the roll bar. These to be bolted through the roof and the floor using a minimum of 10mm bolts. A head rest must be mounted on the bar. See diagram below. 

Sunroof must be covered with steel adequately fixed in place not supporting the roll bar  The above are the MINIMUM dimensions if you have heaver pipe or plates go for it. The scrutineer can drill a hole in any pipe to check its compliance with the rules

D1-1-13 Numbers must be painted in contrasting colours and clearly visible, on the driver's door and
roof. Minimum size 300mm high x 50mm wide.

D1-1-14 No obscene or offensive words or drawings on cars.

D1-1-15 The driver's door may have a 3mm steel plate welded on the driver's side to replace the door
trim, from behind the driver's seat, extended to past the firewall, and securely welded or bolted.

D1-1-16 No locked diffs allowed.

D1-1-17 No wide wheels, racing tyres or space saver tyres allowed.

D1-1-18 Battery must be adequately secured.
Batteries can NOT be relocated into car.

D1-1-19 All airbags must be removed. Aircon systems MUST be de-gassed

D1-1-20 Fuel lines to be secured with no leaks or kinks, and of an approved type. The existing fuel lines are OK as long as they are in good condition.

From a vehicle perspective if it is not in the rules that you can do it, then you cannot. The Speedway New Zealand official will have final say on you vehicles eligibility to race. If your vehicle is found to be in breach of the rules you will not be permitted to take the track.

D1-2     Demolition Derby Racing Rules and Conditions

D1-2-1 All vehicles will be checked and must comply with the specifications.

D1-2-2 All competitors must hold either an SNZ One-Day Derby Licence or a full SNZ licence. You will need to purchase a one day or season licence from Speedway New Zealand directly before the meeting, this CANNOT be done on the night. To obtain your Derby One Night Licence follow the link below

D1-2-3 Minimum age is 16 years. Competitors aged between 16 and 18 years must have signed consent by a parent or guardian.

D1-2-4 All competitors must be aware and accept that they compete at their own risk.

D1-2-5 Competitors must have proof from the issuing authority that they have held at least a Restricted Civil Drivers Licence or SNZ Race Licence. Full civil drivers licence is not required.

D1-2-6 All drivers must wear full length, long sleeved overalls. Leather gloves, boots or shoes must be worn, NOT JANDALS or SNEAKERS. NO NYLON ATTIRE. Clothing to be approved by the Steward on the day/night. Overalls can be Race overalls, Proban or Cotton Full length overalls.

Nylon Banned: The wearing of nylon jackets or overalls by any competitor, pusher or pit crew is not permitted. The competitor must also ensure he does not wear nylon underwear, shoes or socks. In a fire it will melt, and at some point it will need to be ripped off, you have been warned. Make sure there are no holes in your overalls and they are not covered in grease as this will make them burn and harder to extinguish if you have the misfortune of a fire.

D1-2-7 SNZ approved helmet and neck brace must be worn.
Motorcycle Helmets are OK for Demolition Derbies, All helmets must be in good order with no damage or bad scratches Medical neck braces are NOT allowed as they are not designed for racing You will need a visor or goggles preferably with tearoffs as you will be getting a face full of mud.

D1-2-8 No passengers.

D1-2-9 The Demo Derby is to be the last race of the meeting and the track surface must be heavily watered to reduce vehicle speed.

D1-2-10 This competition is with the intention of demolishing opponent's vehicles. Those not competing in the spirit of the intention can be excluded.

D1-2-11 When a red light or flag is shown, competitors must immediately STOP.

D1-2-12 Drivers must not hit another vehicle in the driver's door.

D1-2-13 Cars can only move forward on the track and in an anticlockwise direction, strictly within the confines of the track.

D1-2-14 Competitors will be disqualified when driving on the infield unless the track is completely blocked. Competitors must return to the track immediately after passing the blockage.

D1-2-15 A competitor that is immobilised for more than ONE minute shall be deemed out of the Derby and shall not be permitted a restart.

D1-2-16 No competitor will be permitted to unclip his seat belts or get out of the car while the Derby is in progress, without a direction from the Clerk of the Course or SNZ Official. Obviously this restriction does not apply in case of fire.

D1-2-17 All decisions taken by the track officials will be final and binding and no protests will be entered into.

D1-2-18 The Promoter has the right to order winning cars to be rechecked.

D1-2-19 The taking of, or suffering from the effects of drugs or alcohol by any competitor or mechanic, on the day of any meeting shall be deemed to be conduct prejudicial to the sport.

If you have any questions regarding your vehicle build please email or text 027 483 6278

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