Tire Comparison posted by collegeboy on May 12, 2009 at 06:26 PM
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My wife's Volvo V70R (believe it or not, Volvo makes a high performance car) came with 235/45 Rosso's. She does not drive too hard but we only got about 12K miles on them. I replaced them with Nero's (same size). I have not noticed any difference in performance and the tires are about half worn after 16K miles. I'm not sure if this would translate to your Z as the Volvo's computer adjusts each corner (suspension and amount of power to the wheel) 500 times a second so the computer could be compensating. The only negative that I have noticed with both P-Zero's is that they get quite loud as the tread wears.