Great info, thanks KK....
but I gotta raise a couple points:
Aspect ratio of 45-40 series might be comfortable for an 'everyday driver' in FL, but up here in the Land of Potholes I would suggest 55 series as a cut-off for comfort, 50 series is a worthwhile trade-off, and 40 series is asking for pain. There has to be enough sidewall to allow the tire to flex in response to road conditions.
For the sport driver 40 series is the same aspect ratio as the Porsche Cayman S, which handles better then any PT ever will.
http://www.automobilemag.com/reviews...sche_cayman_s/
Anything lower is just for looks, or glass-smooth racetracks, and will give poor ride quality on real roads.
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And a hardware quibble: The wheels are held on by lug nuts, not bolts. Nuts are female, bolts are male, and so, of course, are studs.
Good luck with your quest for New Shoes
[8)]