The car is a 99 GT with a Cobra IRS under it, the car has been lowered about 2 inches with Steeda springs.



I'm looking to replace the rear 10th anny wheels with 17x10 anny wheels and a larger size tire, but i'm not sure how big I should go on the tire size, I use the car on vacations and such and don't want to have rubbing issues.(currently 17x9 with 275X40 tires)
Any ideas?

These are the wheels

17X10 Gunmetal 10th Anniversary SVE Cobra Style Replica Wheel 20mm

 

not sure with the IRS but on my 99GT i had a set of 17x10.5 with 315/40/17 and had no issue at all

 

315s fit fine. Had them wrapped on my 17x10 Bullits. 315/35/17 - 275/40/17 is the common staggards I see. The backspacing should be fine it that was your main question here.

 

^ yes, thanks, are those sizes roughly the same height as the 275X40X17?

 

The second number is the thickness of the sidewall, therefore the 40 is a meatier tire than the 35. But yeah I dont think you will notice too much of a change from a 40 to a 35, about a quarter inch

 

K-thanks