Hi guys,i recently fitted a 18" rims on my tj magna. Its on a 235/40/18 tyres....
But.....as soon as I drove out of the tyre store...i hear somewhat like a knocking sound comin from back tyres as I make turns....is it hitting something??? Cant seem to see where it is....
Please help :(

Have you checked the wheel nuts are all done up? Several members have paid the price for making this same error. Don't keep driving it around until you get it sorted.

Take off the rear wheels and make sure they are seated on the spacer ring if its there, its a plastic ring that takes the weight of the wheel oved the hub.

You can jack the rear wheels up and spin them, just to check for clearance, but I doubt thats it, but its worth doing.
Really you should take it back, like, yesterday.

Thanks guys...found the problem...its not enuff clearence..
I fitted spacers n its fine now..thanks heaps...now,off I go looking for
A set of lowered springs..