I'm going to the track for the first time with some Mickey Thompson ET Drag 255/50/16's on my stock rims. I'm guessing I should run them at around 15 PSI but i don't want to blow the beeds off the tires on the first run. I took my chrome 17's off with my 315's for this weekend. They are down to the wearbars and I'm guessing they wouldn't pass me through tech. I guess I'll find out which is better, a 255 Mickey Thompson ET Drag or a 315Nitto 555R Drag. Any good starting points for these tires?