C5 Wheels
Le Mans Master
Joined: Mar 2002
Posts: 8,466
Likes: 51
St. Jude Donor '17
Slight rubbing may occur with out them as well.
If you compare the offsets on c5's and c6's you will understand
Pro
Joined: May 2013
Posts: 740
Likes: 83
From: MN
My C5 has C6 wheels that were installed by the previous owner before I bought it. He used 5/16" spacers on the rear wheels to solve the clearance problem. It looks okay, but still a little sunken in. This is about the thickest spacer you can use with stock lug studs; it's still not very easy to get the lug nuts on (the only time I let a shop touch the car, they cross-threaded one) and I'm not happy with how few threads the lug nuts seem to be grabbing. Over the winter, I'm installing longer studs and replacing the crappy 5/16" universal spacers with 1/2" thick hub-centric spacers. I'm hoping I'll be happy with that setup 
