Since 1973, in order to be compliant with strict design started introduced in 1971 (ADR 24), all vehicles in Australia are required to have a tyre placard installed which outlines the specific wheel and tyre combination that is recommended by the vehicles manufacturer. This can usually be found inside the glove box.
Along with details for optional and recommended tyres and wheels, the tyre placard also details the recommended air pressure, speed rating and load capacity for the vehicle.
Changing tyres
You may fit tyres to your passenger vehicle (under 4.5 tonne) other than those outlined on the tyre placard and still be compliant with ADR 24, providing:
- The load rating does not fall what’s outlined on the placard
- Where the speed rating required is higher than S, the speed rating on the tyres fitted must be at a minimum 180 km/h (S)
- For off-road usage, where the speed rating required is higher than N, the speed rating of the tyres fitted bust be at least 140 km/h (N)
- Any other type of vehicle must have a speed rating of at least 120 km/h
There are some instances where the speed rating is allowed to be lower than the rates outlined above when the speed rating of the tyre is greater than the max speed of the vehicle.
Replacement tyres
When you are purchasing replacement tyres, the following requirements must also he adhered to:
- The manufacturer must rate the tyres are suitable for on road use
- Tyre size and construction must match for each axle
Retreaded tyres
If you are planning on using retreaded tyres, than it is required that they are retreaded and clearly marked according to the provisions of Australian Standard AS 1973 – 1993 Pneumatic Tyres – Passenger Car, Light Truck.
