18inch (Legal) mazda 3

[BradstaMS]

It should be fine legal wise aslong as its close to the original rolling diameter

[MISSMPS]

Very correct

i had a barina with 14" steelies...but due to SRi coming std with 16s...i was legally allowed to put 18's on it..

18s on a barina was rather fun





Happy Motoring
duglet

Woot wooo thats one sexy car duggy

We could be opel brothers

[IBOMPS]

in vic it will come down to the largest size that is on the tyre placard of the car...

you can go no more than 2 inches bigger...

[projectrracing]

in vic it will come down to the largest size that is on the tyre placard of the car...

you can go no more than 2 inches bigger...

that is incorrect. in VIC, you are allowed to go:-

15mm bigger (tyre rolling diameter) of any wheel/tyre option available for the chassis
-and-
25mm wider than the widest rim available for the chassis

[SarcasticOne]

in vic it will come down to the largest size that is on the tyre placard of the car...

you can go no more than 2 inches bigger...

that is incorrect. in VIC, you are allowed to go:-

15mm bigger (tyre rolling diameter) of any wheel/tyre option available for the chassis
-and-
25mm wider than the widest rim available for the chassis

Police officer vs projectracing.. who's right?

[Caffeine Fiend]

I've done some searching on the Vicroads website, and here is the following excerpt from The Vicroads Vehicle Standards Information - Guide to Modifications for Motor Vehicles (May 2003)

Link to PDF: http://www.vicroads.vic.gov.au/NR/rd...340/0/VSI8.pdf

Page 3, Section 8:

Replacement wheels and tyres may be fitted provided that they comply with the following requirements:

1) The width of any replacement rim must not be:

- more than 25mm greater than the widest wheel specified by the vehicle manufacturer for that model or vehicle series; or
- less than the width of the narrowest rim specified by the vehicle manufacturer for that model or vehicle series

2) Rims, which have been widened, must have no more than one peripheral weld. All welding must be carried out in accordance with recognised engineering standards, and the rims must comply in all respects with the specifications contained in the Tyre and Rim Standards Manual published by the Tyre and Rim Association of Australia

3) The overall diameter of any replacement rim and tyre must not be:

- more than 15mm greater than the largest diameter tyre specified by the vehicle manufacturer for that model or vehicle series
- more than 15mm less than the smallest diameter tyre specified by the vehicle manufacturer for that model or vehicle series

So, unless I've missed something (like a more recent doc update hidden somewhere on the Vicroads website) it looks like this round goes to projectrracing (sorry Ian).

If you read the definition of "vehicle series" in this case to be the entire Mazda 3 range (including the Mazda 3 MPS), then 18" wheels are legal on a Mazda 3 by Vicroads Standards, as the 2008 Mazda 3 MPS came standard with 18" wheels.

I can't however, find Vicroads' specific definition of the term "vehicle series", however the above assumption seems logical to me.

Dan

[projectrracing]

Police officer vs projectracing.. who's right?

Well according to The Vicroads Vehicle Standards Information - Guide to Modifications for Motor Vehicles (May 2003), I am right.

[Caffeine Fiend]

Which I just posted above mate..... no need to re-iterate it.