Approaching 17,000 miles - it's about to see a lot more miles as i've decided to make the GT350 the daily driver and put the 997S as the weekender. I'd like to see 50,000+ miles on mine before I sell.
JT1652 - the rears are definitely wearing faster (and no, i dont regularly do burnouts! - shame on me...). I have a set of winter tires/wheels so the treads are not down to the wear bars yet but i am guessing they will last no more than 25K with street driving. Fronts may last 50%+ longer...
Got a set of wheels from Need 4 Speed and PIrelli Sottozero's 285/35 front and 295/35 rear - been happy with the Pirellis and the size is pretty much the same as the summer tires