Wheels up to 26mm wider than the largest optional wheel recommended by the vehicle manufacturer for the
vehicle can be fitted without the need to notify the RTA.
The outside diameter of the wheel and tyre combination must be no more than 15mm over the largest diameter
wheel and tyre combination specified for the vehicle and not more than 15mm below the smallest diameter wheel
and tyre combination specified for the vehicle.

ok guys, i have looked for ages trying to find the answer to this question and its just made me more confused.
i got 19inch rims on my el xr6. the tyre size is 245/35 19
i am trying to find if they are actually legal or not, but i just have confusing information
apparently you can only go 2 inches higher in rims sizes, but then again apparently if they are under a certain diameter size then they are legal no matter how big the rim is?
i know there is different laws for different states, and i am in NSW
any help will be much appreciated

Replacement wheels requiring an engineering certificate
Wheels that exceed the diameter and width limits for minor wheel changes must be assessed by a signatory. If the
signatory finds that the wheels are safe for your vehicle, you will be issued with an engineering certificate.
The vehicle owner must notify the RTA so that registration records can be updated. This is done by obtaining an
“Adjustment of Records” and a “blue slip” from an Authorised Unregistered Vehicle Inspection Station (AUVIS).
(contact the RTA Customer Service Centre on 13 22 13 for details of your nearest AUVIS).
The Adjustment of Records, blue slip and engineering certificate are then presented at a Motor Registry.
The owners copy of the engineering certificate is stamped and endorsed by the RTA and must be kept in the
vehicle. This certificate must be presented to an authorised officer of the RTA or the Police when requested.
There are limits on the size of wheels that can be certified by a signatory.
These limits are as follows:
Rear wheels
The maximum permitted rear rim width for a particular vehicle is determined by its unladen weight (10 litres of
fuel, no occupants or luggage) in accordance with the following tables:
Front wheels
Front wheels shall be:
• No wider than the maximum permitted for rear wheels on your vehicle or 204mm (8 inches).
• No narrower than 70% of that fitted to the rear wheels.
• No narrower than a standard wheel fitted to the your vehicle as original equipment.
Front wheel drive vehicles
Except where the original manufacturer provides to the contrary, front wheel widths shall be no more than 26mm
greater than the widest optional wheel offered by the vehicle manufacturer. This requirement also applies to fourwheel
drive vehicles with constant front wheel drive.
Vehicles built to comply with ADR 24 (after 1/1/1973 for passenger cars)
Vehicles that were not built to comply with ADR 24 (prior to 1973 for passenger cars)
Note: 25mm increase in wheel track limit also applies