Legal tyre size

Mark,

Depends on where you are as to how oversize you can go legally. But just doing the sums, you are talking about going from a rolling diameter of 757mm to 797.5 which is a 40.5mm increase; strictly speaking illegal everywhere I think!

yes illegal in nsw.
15mm increase is all thats allowed.

Hi mark

What jimbo is saying is more than likely right. But I own a STR 2002 model and went to the tyre size you want. Cant do it with out a bull bar as the front wheels will rub. I like the extra clearance but your speedo will be out quite a bit ( mind you they are out 10% off the show room floor )Checked mine before and after with GPS. I am running goodyear ATR witch are smaller in diameter than the muddies.Have also fitted series 2000 suspension and wound up torsion bars.
Car rides and handles well. You will also notice a change in breaking and accelleration (slighty slower on start and longer to stop ).But at end of the day you are driving a 4wd not a sports car.One other thing , even if you choose not to step up remember the navara has a high towing capacity compared to some of the other mid sized utes so make shaw what ever you choose meets the load rating required. Hope I have been a bit of help

ross

In NSW, 265/70R16 is the largest you can fit without an engineer's certificate

As Diamaond said. You can go 15mm larger than the largest diameter tyre/wheel combination listed on your tyre placard or handbook.

Have a look at the RTA website for this. Opening paragraph is probably the most important.
"Always check with your insurance company before you make any alteration with your vehicle."

http://www.rta.nsw.gov.au/registration/downloads/vsi/vsi09_rev4.pdf

Cheers
shawn