I have just purchased the 18 x 8 IROC replicas and was wondering what is the largest wheel that these rims will safely fit.

Yes I did a search and through many threads I see tons of opinions.

First does anyone have these.
http://www.hawksmotorsports.com/oe-r...eels-set-of-4/

If so what size tires do you have and a picture would be great.

Looking at the BFG G-Force Sport Comp 2
245/40 18

Would really want to run a bigger tire in the rear if possible.

 

245 perfect 255 about max starts to pinch tire and tire stability decreases with wider tire know smaller width wheel

40 series is good can go 45 to fill out fender better IMO thirdgen look better with taller wheel tire setup

Also I would look for wider wheel so you can gain another of handling from wider wheel like at least 9.5 all around and if I had to settle for cheap wider wheel I'll run corvette wheels setup over irocs 9.5 Vs 8 wide wheel will be a good improvement in handling

Also search a little better and look at you pics info is out that for what answer you seek

 

Thank you

 

Unfortunately a 245-40-18 is the only tire size you should run on those wheels. If you want wider tires, the wheels are too narrow to support them.