[Hal Copple]

i can't offer an answer to your question, but i do know that lots of SPF's run the 17's. But i have two sets of 15inch Trigos, one with street Goodyears, and one with Hoosier slicks for the track.

I know that the 17 in guys talk about the much better traction, cornering, things like that, but in my reasoning, and listening to what i have heard, i will stay with my 15's. First, i don't go sustained 120 mph out on the highway, and just don't push my car thru interstate ramps where i approach my Goodyear's limits anyway. Plus, the 17 in "ride" is really stiff, the tires are a lot more expensive (important to me, i am about to put on my fourth set of rear's), and you need a different rear diff ratio, more cost, due to the lower circ. of the 17's. Plus, the "slip" of the 15's reduces drivetrain wear and tear on the dragstrip.

Plus, i personally like the more authentic looks of the 15's.

Sorta like BB vs. SB, i guess.

To each his own. .