275 or 285 tires
either go 315 out back, or stay with 275, IMO
if you're investing into a set of really sticky tires for launching at the drag strip, or for using in auto-x/road race, where the speedometer doesn't matter, then go for it.
but for a daily driver that rarely/never sees any of those events, i'd rather not have to spend extra money on tuning the car for the new tire height to make my speedometer accurate again (well, as accurate as it can be, anyway).
and for those occasions, it's function over form....just buy a second set of wider wheels with some race rubber on them for those special occasions, and roll around on standard sizes the rest of the time on the wheels that look good.


