4wd mod legalities

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4wd mod legalities

Unread post by JC2000 » May 16th, 2015, 11:28 pm

Hi all,
First time posting and new to 4wding and just have a few questions regarding mod regulations in NSW.
I have done a bit of digging and found out that u can raise your suspension up to 1 third of max travel and tyres no bigger than 7% rolling diameter. Are these laws still valid?
I drive an 09 ford pk ranger currently running 245/75/16 tyres.
So to the pointy end of my questions. Is a 2 inch lift with in the scope of my vehicle?
And I would like to go to 265/75/16 tyres but by the letter of the law they are just over the 7% allowed for the biggest tyre size on my cars tyre sticker, which is 245/70/16.
I don't want to make my car illegal so has anyone has any issues getting tyres that are just outside the limits engineered?
I apologise if this questions has been asked before but I am very confused on what u can and can't do to your 4wd and I don't want to get caught out, so any advice would be greatly appreciated.

Rogers Cruiser
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Re: 4wd mod legalities

Unread post by Rogers Cruiser » May 17th, 2015, 11:35 am

Here is my understanding of the laws.

you can increase the height of your vehicle by 75mm, a max of 50mm by suspension increase and an increase in wheel diameter by 50mm (giveing a 25mm increase in height)

Most 2 inch lifts are closer to 45mm then 50mm you you should be right, and to be honest Im still getting my head around metric tires sizes so someone else can help there.

If i n doubt ask at a 4wd install place, just be very clear that you need to be legal.
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Re: 4wd mod legalities

Unread post by Lovey71 » May 17th, 2015, 1:23 pm

G'day JC2000,
I don't know where the 7% figure came from, but the rolling diameter of the your tyre/wheel combo can't be more than 15mm over the largest size on your tyre placard and not over 15mm smaller than the smallest size on your placard. So the combo you put up wold not be within the limits.
Here's a link to a calculator on the exploroz forum, so you can put some different figures in to find the right size to stay within the lmits.
Hope that helps,

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Re: 4wd mod legalities

Unread post by JC2000 » June 1st, 2015, 9:25 pm

Thanks for your replays guys, much appreciated!
Another question to drivers of 09 rangers, does going to 265/75/16 tyres sap too much power and have any noticeable affect on low range performance?

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