Bigger tires on a 10.5" rim
 

Has anyone put 315 tires on an 10.5 inch rim to go to the track. have rune 305's for the past two seasons and have a chance to acquire a set of PS2's off of a Mach 1 but the sizes are 305 and 315. Has anyone done this?

I haven't, but those PS2 tires have a rim width range spec of 10.5-11.5. They can definitely be used on your wheels. I wouldn't call it ideal, but if they're anything like my PS4S tires, then they tend to run a bit small anyway. If you can get them for a good price, then I'd do it.

Thanks for the info

It just depends on the tire, some tires are just “wider/skinnier” than others. I run 315/30/18 Nankang AR-1s on an 18x10.5 and it fits perfectly, but not all 315s would fit as well. You just have to pay attention to the manufacturer’s wheel width range.