iirc the best i EVER got with my nittos was like a 2.02, MAYBE a 2.01 60', although i did get close to it a few times, and that was after 4 years of almost daily summer driving and about 40-50 passes. actually still had good tread on them when i swapped em for my current g-force sports (which have gotten a 2.07 or 2.08), but they were cupped real bad down the middle. i do wonder how fast i actually could have gone with them, since i didn't really start powershifting until after i got rid of them (was too afraid of breaking the t5) and i was able to meet, and beat, my best nitto et/mph with the bfg's (on my second pass on them btw, barely even had em 4 days).
anyway, the radial pro's are out just because they're not a DOT tire (somewhat important to what i'm trying to do), but i am back to leaning towards the radial side. am i reading right that the regular et street radials are the same compound/construction as the pro, just a different (DOT friendly) tread pattern?
again, sizes im looking at:
275/50-15 (26x11.5): same o.d. as my street tires and my old nittos, shouldnt have fitment issues, but 4.10s make for a lot of revs
255/60-15 (27x10.5): a little more sidewall (and looks awesome in the well), but loses an inch in width, but also shouldnt have fit issues
275/60-15 (28x11.5): dunno if i have the power to really get this tire moving yet, possible fit issues, but is basically the standard "rule" size for almost every class i'd be interested in assuming i started class racing