We have a customer who wants to drop to an 18 x 8.5/11 race setup for his 997 S. The stock 235/35 19 and 295/30 19 setup has an overall diameter of about .4-.5" taller in the rear. If we go with Pilot Sport Cups in 235/40 18 and 315/30 18 the overall diameter in the rear is reduced to that of the front. Has anybody here done this and had any problems with any of the car's systems (ABS, PASM, Traction Control, etc). Would like to get an definitive answer as soon as possible. Thanks.

 

I kind of remember some guys swapping to 18's for the track and reporting that the handling was a bit strange. Check the forums on the other Porsche site because I remember reading it there.

 

check with Evo, they went from 20" techarts to 18" OZ superleggara on their supercharged 997

 

Links are down, anyone have a phone number/contact name?

 

480-317-9911 Ask for Todd or Mike