My tyres are illegal in Qld what are the options?

Submitted: Wednesday, Jul 23, 2003 at 16:27
ThreadID: 6129 Views:11232 Replies:7 FollowUps:6
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After getting a response from my post on rim and tyre sizes 2 days ago I went to Qld Transport and in the modifications booklet found that the max diameter allowable on Qld road is 15mm taller than 275/70 x 16(785mm) in and 80 series landcruiser. This translates to 800mm. I have 305/70's on my landcruiser and these are 827mm ( after doing the maths). The tyre guy said nothing about the illegality of putting these on.

Will I have to get an engineers cert. or just get Qld Transport to OK them. Does anyone know what engineers cost to look at tyre width and possibly suspension?

Here are some other tyre sizes that are too tall on an 80 series and probably the majority of other fourbies in Qld.

275/75 x 16 = 812.5mm

285/75 x 16 = 827.5mm

also 33 inch tyres are 825mm
and any above that height.

I originally thought that the max. width was 15mm over the manufacturers recomended but the booklet states that " The maximum tyre width must not be more than 1.3 times wider than the vehicle manufacturer's widest optional tyre. However, in the case of off-road passenger vehicles fitted with front and rear beam axles, the maximum tyre width must not be more than 1.5 times larger than the manufacturer's widest optional tyre." (providing that they remain within the body/flares).

I found this interesting as it means you could put 401mm tyres on, thats 16 inch wide tyres on the 80 series if you can get flares wide enough. Pity no one makes these in under 33 inch tall tyres, and even if they did they would look pretty funny.

we live and learn

Charlie
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