315 is a lot of tire to fit on a 10" rim. I run 265/305 on stock Rays with 15/20 spacers and Swifts with no issues. I do get some tramming on uneven roads, I would think it would be worse with bigger tires. The handling may get a bit sloppy with that much tire on 9" & 10" rims too. I could tell the difference when I switched to larger tires. I really need 9.5" & 11" rims to run these sizes properly IMO.