Join Date: Oct 2002
Location: Caledon, Ontario ... CANADA !
Direzza DZ101, or Star Spec? The Star Specs are 200 treadwear rating, and the largest they are available in 17" is the 265/40 size. They also show as going on a minimum 9" wheel, same as a 275 would.
Not sure what else is out there in a 200 treadwear tire that is available for a reasonable price in 275/40/17, but if you are leaning toward getting 8" wheels and squishing something on there, I can say that the Star Specs are kick-ass tires. I have them on my beater SHO track day car, and they hang on like crazy, dry or wet. Street ride isn't great, but that's the trade-off. The DZ101 aren't bad either, we had those on a Contour that I drove in a Chumpcar race last year, but nowhere near the grip level of the Star Specs.
I don't think that you would notice much difference between having 265 or 275 rubber unless the rest of the car was optimized ... they work decently for what they are, but when you boil it down they are still a heavy pig to be wielding around a road course.