18x10.5 tire??'s
The only 315 that would work on a 10.5 are Nitto 555r's because they run narrow but I dont think they make them for an 18" wheel.
Get 295's and you'll be fine.
I did my research and decided that 295/35-18s would suit me best on the rear, and 275/35-18s is what I chose for the front. I've already got my tires sitting here waiting for the wheels to arrive...BFG g-force KDW's front, and BFG g-force Drag radials for the rear
you'll be okay. there is one tire i researched that they suggested a 10.5-12inch width. i can't remeber what tire exactly, but i believe it was a drag radial tire. also, you can send your wheel out to get widened in 1/2inch increments. i'm going get the black Z06 wheels with 17x8.5 up front and 17x9.5 for the rear, but send the rear out to get widened to 17x11s.
good-luck
almost forgot, Nitto makes a 305/??/18 tire that will fit a 10.5 wheel, but it's a 26.5 tall tire. not a BIG deal, but will affect your speedo slightly.





