tyre size in QLD

As I understand it, QLD currently has a limit of 15mm Diameter increase. I also hear that in the new year they are going to adopt the National Code of practice which will allow up to 50mm increase on 4WDs.

Some dealers don't care about the regulations etc and will fit whatever you want, others try to follow the local requirements. There are a number of differing regulations around Aus but hopefully all the states will adopt the new code at some stage.

31 inch tyres are standard arnt they?...
I dont understand...
31's are small..

Under current Qld regs the maximum lift is 50mm and the max tyre increase is 15mm. Any more than that is unroadworthy (illegal) and cannot be engineered to make it so.
Don't hold your breath waiting for the adoption of the National Code of Practice. They've been talking about it for forever.

when I wanted to put 33 muds on the pajero I had one tyre shop tell me it was illegal and they wouldn't do it.
I then went to Bob Janes and said I want to put 33 muds on my pajero and they said no worries, did it straight away and did not tell me it was illegal...
Who are you suppose to believe???

The reason there limits for tyre size increases is for the effect that larger tyres have on the brakes.
It has nothing to do with gearing or speedo errors, that is for the driver to worry about.
Any increase in tyre size has a detrimental effect on the brakes as well as possibly increasing the load on suspension and drivetrain components.
Taller tyres affect the brakes more than you realise especially when fully loaded and towing as the taller tyre has more "leverage" or mechanical advantage on the brakes than the standard size tyre.
A tyre with an aggressive tread pattern can also increase stopping distances compared to a similar size tyre with a road orientated tread pattern.
If like me you are sceptical do what I did with my old troopy. I borrowed a set of 33" muddies on the same rim and compared stopping distances with set of road tyres in the standard size, made quite a difference not only to the stopping distances but changed the handling and feel of the vehicle as well.

Lex M posted above the QLD modification document so compliance or non-compliance is laid out in the document for all to read. There is no guess work.

Wheel diameter can be changed but tyre diameter cannot be increased by more than 15mm or decreased by more than 26mm.

Have to watch if tyres and wheels alter track!!

Alan

dose any one know if there is an insurance company that specialises in 4wd, i was reading a 4x4 action mag and they had a thing on insurance in it. saying most insurance company's will not cover you if you are not on a gazetted road. most of as would be touring at some stage off the beaten track. was wondering if anyone knows a company that will insure you no matter where you have an accident.