I run a 25.5 inch tire and that is shorter than stock. But, it just gives me a little lower gear for launching.
Robert

 

i crossed the traps within 100-200rpms of shifting out of 4th gear yesterday with 4.10's and 275/35/18's (25.6" tire). it looks like im gonna need some 3.73's if i spray, i dont think i can fit 28" tires easily under my lowered car.