State Tyre Size Regulations

[mjforder Senior Member Find all posts View Profile Close mjforder]

Hello

Whilst reading various posts and replies on tyre sizing i thought i do a little research and found the following. It may not be the most current but at least may help to answer people's questions on permissable size variations for each state or territory.

http://www.toyo.com.au/TechInfoPDFs/Alt ... ations.pdf

Question...Is a Prado (in SA/TAS):

1. A passenger car or passengar car derivative, or
2. An off-road passenger or commercial vehicle?

If 1, then max permissable diam increase for SA/TAS is 15mm - otherwise if 2, then its 50mm.

regards

Michael

p.s. The funny thing is that once i go over the border, i would "legally" have to change my tyres. Cant see that happening logistically.

[fishnut Advanced Member Find all posts View Profile Close fishnut]

That's interesting - a good summary of where it's all at.

So for all the advanced states (those that have followed the national standards...) you can only have:

265/65 and 265/70 (75s would be 3cm bigger than legal)

or for those thinking about it, 285/65 (70s would be 5.5cm bigger than legal)

or, you could have 245/80 :wink:

[mjforder Senior Member Find all posts View Profile Close mjforder]

That's interesting - a good summary of where it's all at.

So for all the advanced states (those that have followed the national standards...) you can only have:

265/65 and 265/70 (75s would be 3cm bigger than legal)

or for those thinking about it, 285/65 (70s would be 5.5cm bigger than legal)

or, you could have 245/80 :wink:

Fishy, not sure about that. Reading the specifics an allowance up to 15mm on the diam is permissable. 265 x 0.65 = 172.25mm (radius) so, 265 x 0.7 = 185.5mm (radius), difference = 13.25mm or 26.5mm (diam) larger which is not allowed.

I worked out the best that can be done is 245/70/17 which is 2.5mm less than std. that size is available on some cooper and MT tyres.

[fishnut Advanced Member Find all posts View Profile Close fishnut]

As per your initial question, I would have thought that the prado falls into this category, giving us 50mm :?:

For off-road passenger or commercial vehicles , The overall diameter of the wheel and tyre combination must be no more than 50mm larger and not more than 26mm smaller than that of any tyre designated by the vehicle manufacturer for that model.

[mjforder Senior Member Find all posts View Profile Close mjforder]

As per your initial question, I would have thought that the prado falls into this category, giving us 50mm :?:

For off-road passenger or commercial vehicles , The overall diameter of the wheel and tyre combination must be no more than 50mm larger and not more than 26mm smaller than that of any tyre designated by the vehicle manufacturer for that model.

Yes - for SA and TAS people only. For those drivers/cars outside these areas its then a game of roulette. That's why i mentioned for SA and TAS people.

[fishnut Advanced Member Find all posts View Profile Close fishnut]

and WA (& ACT) - hence my dig at being one of the 'advanced' states.

I think I'm reading it correctly??



WESTERN AUSTRALIA
Refer to Tasmania
Current Regulations - Quoted from "National Code of Practice for Light Vehicle Modifications " (NCOP), Section LS, Part 4. National Code of Practice for Light Vehicle Modifications


The Federal Government is currently attempting to get all states and territories to adopt this code, which includes regulations for alternative wheels and tyres, in Section LS, Part 4. Currently Tasmania, South Australia, A.C.T., and Western Australia have adopted this code of practice. The current regulations for alternative wheels and tyres for Queensland and Victoria are very similar to those included in the N.C.O.P. for light vehicle modifications.

[mjforder Senior Member Find all posts View Profile Close mjforder]

and WA (& ACT) - hence my dig at being one of the 'advanced' states.

I think I'm reading it correctly??



WESTERN AUSTRALIA
Refer to Tasmania
Current Regulations - Quoted from "National Code of Practice for Light Vehicle Modifications " (NCOP), Section LS, Part 4. National Code of Practice for Light Vehicle Modifications


The Federal Government is currently attempting to get all states and territories to adopt this code, which includes regulations for alternative wheels and tyres, in Section LS, Part 4. Currently Tasmania, South Australia, A.C.T., and Western Australia have adopted this code of practice. The current regulations for alternative wheels and tyres for Queensland and Victoria are very similar to those included in the N.C.O.P. for light vehicle modifications.

Touche! I guess those convict states are still trying to get their heads around it.

[Kevin Senior Member Find all posts View Profile Close Kevin]

I was just looking it the Queensland quidelines

http://www.transport.qld.gov.au/reso...on_jan05v2.pdf

and just noticed this

an off-road passenger car (but not light
commercial),

in the section for replacement tires. :? :?

[George_M Junior Member Find all posts View Profile Close George_M]

It seems that Victoria has joined the enlightened States.....

This is part of the email I received from Vic Roads in response to a question about the legality of changing tyre size from 265/65R17 to 265/70R17 on a 120 Series Prado.

"It is acceptable for vehicles to comply with Vehicle Standards Bulletin (VSB) 14, the National Code of Practice for Light Vehicle Construction and Modification:

http://www.infrastructure.gov.au/roads/ ... eb2006.pdf

The overall diameter of any tyre fitted to an off-road passenger vehicle or a commercial vehicle must not be more than 50mm larger or 26mm smaller than that of any tyre designated by the vehicle manufacturer for that model."

The Vic Roads website is still showing the State-based, "no greater then 15mm..." information.

One small step?

Now I can pay more attention to the MTR/MTZ/STT/Procomp thread :P

George_M

[D4D Addicted PP Member Find all posts View Profile Close D4D]

When I fitted the BFGs last week 265/70 the tyre guy said +50mm of the largest size on the tyre placard

[pcm_120 Member Find all posts View Profile Close pcm_120]

SA guys, be careful. Transport SA has NOT adopted the National Standard (just double checked) so legally… we can only go

15mm in overall diameter (ie tyre diameter)
+/- 50mm in rim diameter
26mm wider in track

Transport SA has been looking at the National Standard for years now and they still have no clear idea of when or what they are going to do in relation to them. :roll:

For more info (SA only) go to http://www.transport.sa.gov.au/pdfs/...bulletin_3.pdf, page 13 & 14. This is what they are using...

(Transport SA Tech standards number is 1300 882 248 if anybody wants it)

Paul.