JBert,
Thanks for the quick info. Looks like using an online tire shop recommendation for that car the max is 275/40/19. That is much better than the 255's I can fit on the 06 GT premium 17" rims, but not quite where I want to be... I plan to mod this car over time and go either turbo or s/c so I would need somewhere around 295-315's...
Hmmm...
Well again thanks.