Can the rear of the RS fit a 335/30-18 given the correct wheel width and offset?

 

Curious myself actually... any luck?

 

None yet, but I think it will work given that the GT2 uses 325/30-19. I am going to give it a try when I get a set of 18s for the track.

 

I would be a touch wide if you have it to low. The cup car and street cars use totally different wheel houses in the rear. Inside just ubove shock come out a half inch or so which will cause rubbing. Good luck

 

Thank you, I didn't realize that. With a GT3 it wouldn't work given what you said, but do you think the RS rear bodywork being wider than the GT3 might allow that extra clearance?

 

Yes, Rad (NJ-GT) ran 335's on his 996 GT3 and I believe he run them on his current RS. You need around 3 degrees negative camber and the proper offsets

 

Yes, just remove the rear spacers (5mm).

I'm running MPSC 345/30R19 (almost 1" taller than the stock 305/30R19). The 345 is much wider than the 325 MPSC I was running the last 4 months (OEM GT2 tire).

Just be aware, that your front 18" need a low profile, to keep the ABS from going nuts. 35 profile in standard widths should be fine (245-255/35R18).

I just found out that I'm running out of suspension travel, as the increased rear grip (plus slightly taller tire) gets to rub the top of the inner fender liner under heavy compression, this is easily fixed by installing stiffer springs and matching shocks, or driving slower around the track.