Originally Posted by LFZ
The problem with that 285/30-18 cup tire is the diameter...its considerably shorter than the stock size that is called for on our Zs. And running the taller 345/30-19 tire on the rear is bound to throw AH/TC issues. You'd be better off running the 325/30-19 N-spec cups on the rear.
the only reason i was getting cups was because i was getting the rears for a killer deal, do you think i should just hold off and get the PSS tires in the 275/35/18 and the 345/30-19 in the rear. i run this set up now with run flats up front and 345 NTO5Rs in the rear with no issues, if i run the 285 up front and the 345 in the rear it'll cause some problems?