check the fine print on the tyres, Like GBC said "if they are Australian tyres then I wouldnt worry" the troubl;e starts when you buy a CT imported from China. Mine had "Coopers all terrain" on it when it came, I thought...not happy, but they will have to be reasonable to carry the "Cooper" name and headed to the Kimberlies.
It was only after I got home and tried to change the tyres to something that was an "off road" tyre when I found out they were Chinese rubbish made in China at the Cooper factory.
Cooper Aus will not warranty anything that they do not import.
Chinese tyres are not made for Australian conditions.
I have included pics of what to look for on the tyres, and what the tyres look like after 10 klms of Gibb River road.
W e were lucky we were driving slowly, no damage to the camper. Wheel and tyre were stuffed due to the weight of the camper [not overloaded].
In the pics you can see the splits in the rubber around the rims [i was told by the people I bought it from they had been slashed] that was after 3500 klms on sealed road.
It is not worth the risk. Check your tyres and where they are manufactured.
cheers rastus