Quick question. Can you put 18s on a 13 C4S? i know you can put 19s on but I had 18s on my 03 c4s and it drove incredibly well in the winter so I'm looking to duplicate that.

 

You can do anything you want, however nothing below 19's are approved by PCNA for the 991.

 

Thanks. What do you guys think of the 19" Pirellis? I had Michelin Alpins before which were excellent. I've been searching posts and have come up with several negative posts about the Pirellis. Also, do i have to take the spacer (5mm) off on the snow set?