Outer Limits 4x4 Board

What is the largest tyre that is speed rated in Australia? I.e. can be legally driven along the highway. Any tread design or rim size.

What do trucks run?

Ok - I mean largest offroad tyre suitable for a 4WD, no truck tyres etc.

52" michelin XML

mtb4x4mad wrote:What is the largest tyre that is speed rated in Australia? I.e. can be legally driven along the highway. Any tread design or rim size.

33's are not legal in QLD on any of the popular 4wds. 15mm over the the manufacturer's largest optional tyre is the regulation up here. DOT in QLD are wankers

cheers johnz

1MadEngineer wrote:52" michelin XML

Are they speed rated?

I had a quick look (because I have nothing else I'd rather do ) and found this: http://www.tirecraft.com/commercial/MichXMLspecs.htm

Scott

mtb4x4mad wrote:

1MadEngineer wrote:52" michelin XML

Are they speed rated?

yes, they are basically a truck tyre, radial and groovable

My XMLs are speed and load rated, and says on the side wall "for highway use in North America, Australia and Canada.

Mock

Big difference between speed and load rated and legal.

Unless you're driving a unimog good luck making a legal vehicle. I dont think the cops will care that the tyres are load rated in the slightest.

XML's are legal for street use but in most cases to big for a 4x4 legaly, but you can have a good argument with the cops about it


Mock

I thought you could have 33"s on a jeep wrangler because the upgraded version in the states also i think suburbain does it ... comes standared with em

But the wrangler rubicon ain't an australian available model adn thus does not meet Adr's.

besides which is the tyre plate mointed on your car that matetrs - not the one in the states.

most states (excluding QLD of course) will legally allow 33" with approved engineers cert.

May be harder to pass soon *IF* (and that's a big IF) the National code of Practice is adopted.

... and also the Rubicon only comes with 31" (LT245/75R16).


My guess is that pig ain't gunna fly.

I have no idea what your plans are but u could try and get it regoed as custom farm equiment, anything goes then i think ??? 53s, full hydro.......35km/h speed limited , but u probley have to own a farm??
Dont know, just something iv heard a couple of times

from memory isnt the big yellow cruiser from tuff trucks on farm rego or something like that

flyinwall wrote:from memory isnt the big yellow cruiser from tuff trucks on farm rego or something like that

Here http://www.outerlimits4x4.com/PHP_Modul ... rego#77414

Just about anything goes if u get farm permit. To get a tractor registered you just fill out a form that says the vehicle is roadworthy (ie blinkers, rear mirrors, etc) and away u go. U need to have apurpose to have it on raod tho- ie travelling between farms, council use etc. You could build a 4x4 with massive wheels and call it a tractor because people do that for a living- spray rigs, cow chasers but u do need to be a primary producer or contract to one.

Anything but comps or speed limits

You can still get larger tyres passed and I believe a new placard issued.......But to prove it you'd need to allow for:
Differential/drivline strength,
Braking capacity,
Handling effects (think swerve tests),
Bearing/load placement,
Steering effect.

Really most of the stuff you should think about anyways