Oh, I got plenty of use form the old ones. I've got a pretty good amount of camber in the car, but didn't swap left to right enough. I wore out the outside edge of the driver side and inside edge of the passenger side. It was weird though. They were low on tread, but not corded at all. The sidewall just began separating from the tire.
I'm just wondering about running the 315's if they will fit. Are the Gen 4 ACR wheels the same width and offset as the Gen III 10 spokes? Any issues on rubbing? They will obviously be used as track tires only, but if I turn all the to lock in the pits, am I going to catch something and tear it up?
I'll probably only track the Viper once a year from now on (NARRA) because I ordered a dedicated race car last month. Since the tires will probably get hard before I wear them out now anyway, I'm looking at used tires and found some 315's.