So, i am taking delivery of a 2003 cobra with around 600 hp here in the next week or so. I have a question about tires and alignment.

I want to add bigger tires on the back. Something like 330/30/18. I know i need to add bigger rims, something like 18x9.5 or 18x10.But i am not sure about the exact size rim. Does anyone know what the largest tire and rim you can put on the car without having to roll the fenders or add different bolts?

Since the rear tires are going to be much larger then the front, i was wondering about the alignment. Since i normally do a modified-x when rotating, would i just move the tires side to side and would this really shorten the life of the tires or would it not really matter?

What tire size and larger rims do you all use.

 

WOW!
I don't know what the largest size tire that will fit the IRS Cobras without rolling fenders, but I do know that you will need/want at least a 10.5" or maybe even 11" wide wheel for a 330mm wide tire.

 

You need to run low profile IRS Bolts and possibly spacers to go super wide.
http://www.lethalperformance.com/03-...olts-2-p-13056

Here is a decent thread on wide tires on Terminator.
http://www.svtperformance.com/forums...ever-used.html

 

You can't go any higher than a 305 without having any modifications.

 

...I've seen 335's on a 10.5" - 17" wheel ...Looked good!!!

If you're lowered, you might have to roll the lips...and get an alignment to the factory specs!