Vehicle modification regulations

[yowie78 Junior Member Find all posts View Profile Close yowie78]

http://www.infrastructure.gov.au/roa..._2011%20v3.pdf

This is the link to the actual vehicle mod regs. Out of interest, it says that wheel diameter can be increased by 50mm for 4x4s, not 15mm as is often quoted here. Overall vehicle height is still limited to 2 inches without certification.

[wooley Avid PP Poster! Find all posts View Profile Close wooley]

interesting.

[Justo77 Senior Member Find all posts View Profile Close Justo77]

I haven't sat down and gone right through the link yet but it is my understanding that you can increase your wheel diameter 2 inches (ie go from a 17" wheel to a 19" wheel) as long as the overall diameter (outside diameter of the tyre) does not increase by more than 15mm, therefore if you fit larger wheels you would need to fit lower profile tyres.
Having said that I would be more than happy to be wrong on this one.

[Justo77 Senior Member Find all posts View Profile Close Justo77]

4.2.4 Overall Nominal Diameter
The overall diameter of any tyre fitted to a passenger car or passenger car derivative must not
be more than 15mm larger or 26mm smaller than that of any tyre designated by the vehicle
manufacturer for that model.

Just found this extract from page 21 of the link

[wooley Avid PP Poster! Find all posts View Profile Close wooley]

4.2.4 Overall Nominal Diameter
The overall diameter of any tyre fitted to a passenger car or passenger car derivative must not
be more than 15mm larger or 26mm smaller than that of any tyre designated by the vehicle
manufacturer for that model.

Just found this extract from page 21 of the link

did you read any further?

The overall diameter of any tyre fitted to:

*4WD passenger vehicles specifically designed for off-road use (typically MC ADR
category). All wheel drive (AWD) vehicles including those AWD vehicles that may be
certified as MC ADR category, (also commonly known as soft roaders) are not
included in this category;
*4WD goods vehicles and their 2WD equivalents if the chassis and running gear are
essentially the same as the 4WD version (N ADR category); or
*any medium weight goods vehicle (NA2, NB ADR category).

Must not be more than 50mm larger or 26mm smaller than that of any tyre designated by the
vehicle manufacturer for that vehicle.

[AJ120 Out of control poster! Find all posts View Profile Close AJ120]

I was under the impression that this is still all proposed legislation and that all the different state governments were still debating whether to introduce this or not.
It's been going on for some time now, would certainly be good if they adopted it.

Cheers Andrew

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

As Andrew has posted these are only a proposal, the individual states still have to ratify them (via legislation ?)
In Qld they were supposedly going to come into effect June/July but we already know that is not happening and have been again put on the back burner ... more important issues to deal with apparently.

So you still have to check your own state regulations as to what you can or can't do.

It would be way to simple and smart to have common rules Australia wide wouldn't it

Lee

[GreenPrado Lurker Find all posts View Profile Close GreenPrado]

Another good reason to get rid of state governments. It would be more efficient from a financial and practical point to have one central government controlling road laws, vehicle regulations, licensing and registration. Local issues could be managed by local councils - this works well in the UK. Currently what is legal in one state is not necessarily legal over the border. If we were separate countries fair enough, but as we are all Australian we need consistency.

[Bassett Member Find all posts View Profile Close Bassett]

Another good reason to get rid of state governments. It would be more efficient from a financial and practical point to have one central government controlling road laws, vehicle regulations, licensing and registration. Local issues could be managed by local councils - this works well in the UK. Currently what is legal in one state is not necessarily legal over the border. If we were separate countries fair enough, but as we are all Australian we need consistency.

Totally agree with this comment. Well said GreenPrado.

[yowie78 Junior Member Find all posts View Profile Close yowie78]

I got the link to this information from the Senior consultant from the Dept of Transport in WA so I believe that this is what to go by if you are over this side of the country. I had emailed him to ask the standards we have to go by in WA.

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

Hi Yowie,

The second page in effect says this is a guide only, check with your relevant state body.
I would be getting a copy of your state regs and follow that rather than using only the NCOP Guide.

Lee

[yowie78 Junior Member Find all posts View Profile Close yowie78]

This is the letter I sent and the reply I got from dept of transport.

Good morning, There is a lot of conflicting information out there on the actual regulations in WA in regards to how much you can raise your 4wd (springs and shocks)by, and what increase in tyre size you can have before engineers certificates are required. I have trawled through pages of info from your website and have not been able to find the relevant info. Could you please point me in the right direction for the regs? Are these regs coming into line across australia soon? Could you please provide a breif summary? ie You can raise your vehicle by ''x'' millimeters You can raise your tyre size in each dimension by ''x'' mm. Thankyou in advance Sincerely

Thank you for your enquiry.



Dear Matthew

Please refer to Vehicle Standards Bulletin 14- Suspension and Steering NCOP11 under the following link for more information:

http://www.infrastructure.gov.au/roa..._2011%20v3.pdf



Alternatively, you can contact an Engineering Signatory who is familiar with vehicle construction and modification. These people have indicated that they are available for consultation and their contact details are available through the following link: http://www.transport.wa.gov.au/media..._VS_IB_102.pdf



If you require further information please do not hesitate to reply to this email. Alternatively, you can visit our website, www.transport.wa.gov.au/licensing or call our Customer Contact Centre on 13 11 56 or +61 8 9427 6404 if you are calling from outside Australia.



Kind regards,







Natalie

Senior Consultant

Communications Team

Driver and Vehicle Services

Department of Transport

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

Yowie mate, your so screwed lol
I just had a read through that lot and to my uniformed brain there is a lot of double speak and no (to me anyway) obvious statement of "this is what your allowed to do"
The closest I found was in the "Road Traffic Regulations 2002" where it says
A person must not, without the approval of the Director
General, alter a car or a derivative of a car from —
(a) the manufacturer’s specifications; or
(b) its form when it was first licensed, in regard etc etc

It seems like it was written by a politician.. a lot of words but doesn't really commit.
Here in Qld you can get a copy of what you can and can't do quite easily.

Good luck
Lee

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

I just got off the phone with the dept of transport here in WA and over here it looks like they count overall lift, and the line is set at 2 inches max with out certs. Soin other words you can have 2inch lift, but then you can't change the tires without a full engineer inspection and lane change test. The bloke on the phone reckons if your going to go down this path you might aswell go the whole hog and get 50mm suspension lift, 50mm body lift and go up 50mm in tire size giving you the max permissable 150mm overall lift.
i'm guessing 99% of people just go down to the susp shop and drive away with more than two inches, not worrying to much about the inspections, which seems really appealing at the moment. But has anybody gone down the legal path and had to cough up for engineers certs and lane change test? any advise would be great. I'd like to do the righty, but it seems like a lot of $$$ and a lot of paperwork.

[Steve M Addicted PP Member Find all posts View Profile Close Steve M]

Dead right AJ, if you ring the RTA here In Sydney like I have a few times our law here is no more then 15mm and tyre shops who do care for there customers will tell you also including Bob Jane here In Penrith informed me running 70 profile on my 120 instead of 65 would make me ilegal, BUT was still wiling to sell them to me and put them on my vehicle which then would have made him liable if anything went wrong going by a solicitor I spoke to, so a lot of tyre shops here in Sydney leaving them selves wide open. I was informed by the solicitor that in a court case situation it would have to be proven that the bigger tyres some how contributed to the incident, well I reckon hitting some one and either injuring them or killing them would lead back to tyres, which then involves breaking etc. Not worth the chance in my opinion, I was debating to myself for months wether to go bigger tyres or not but I wont be, noy unless the law is changed here in NSW...Cheers Steve