l/cruiser 200 series gxl t/d

any help forthcoming? tractor

The difference in diameter from 285/65/17 to 285/70/17 is only 14.2mm.
Can't see how this is illegal in QLD as it is within the +/-15mm allowable change in rolling diameter.
I suspect others have gone to 285/70/17 with no issues

Isn't the overall diameter difference about 28mm? 802 vs 830mm.

A ~28mm overall diameter change is a ~14mm height change :)

Cheers

Captain

Forgot to add that I have 285/70R17 BFG TA's and reckon they are a great all rounder. I took off my A22's right at the start, do not understand why they put passenger rated tyres on a 3 tonne truck thats marketed as the "King of the Off Road" ?

I too was planning on the GRR, Mitchell Plateau, Cape Leveque etc... and thats one of the reasons I changed tyres. I aslo added a snorkel, amongst many other things, good insurance IMHO.

While one may make it on the A22's, I reckon its all about safety margins and insurance. There is simply no comparison between a LT and passenger rated tyre and when going on the type of roads mentioned above, why would you even attempt it on P rated tyres? Ask any experienced long distance tourer about what is THE most common problem anyone has and the answer is tyres - yet how many people try and see if they can make it on older or poorly rated tyres?

Cheers

Captain

Yes, 28mm, not 14mm (how is it said these days- "my bad"!). :)

I wouldn't worry about the change in tyre size for QLD in your case. You would hardly notice the difference visually.

Not visually no, but technically they are illegal.

Technically I agree, but that's where it all gets quite pedantic. :)
Technically, that would also render many 4x4's illegal on the road (e.g 31x10.5r15's on a hilux (up to 20005 mod) are outside the allowable increase in diameter limits (30x9.5R15 should be used). How many of these are getting around....

I guess it's a personal question of managing risk. I have never heard of a case where insurance was knocked back because of a tyre being 10mm over diameter. Depends how much attention the vehicle draws - if it is blinged up, lifted high, has 10 spotties etc, then it will no doubt be looked at closer than a bog std car with tyres appropriate to the cars use (per Capt above).