I think the only 315 that will fit on the stock 17x9 wheel is a Nitto since they run narrow. I believe any other 315 will be too wide for the stock wheel.
I have the Mickey thompson street drag 315/30/18 on my 10.5 saleen replicas. It rubbed inside of the tire to the IRS bolt. So replaced the stock bolts with the ones sold from Lethal Performance $12. item, solved my problem. I also have the H & R springs 1.5 inch drop. It has room back side of the rim and front. Next time around going to get 315/35 or 40 to fill up the gap