will 315's fit a 997 C2S?
 

how wide can you go on the rear without getting into issues?
Thanks

I wouldn't go wider than 305.

^^+1

With the proper offset it would work. Probably need to go with a custom wheel like CCW.

315 will fit but you do not need that size plus it will make the front push/understeer even worse.

315's on my 997
http://i63.photobucket.com/albums/h1...r/IMG_0821.jpg

V35, what offset are your rear HRE's?

very nice! ok, i'm gonna do the same.
thanks for the info.