18 " wheels
Melting Slicks
Joined: Dec 2003
Posts: 2,487
Likes: 1
From: Sydney
There has been several threads about this lately.
Here is one I started that deals with Torq Thrust II's but it applys to fitting rims of any kind: http://forums.corvetteforum.com/show...5&forum_id=119
You should find all the info you need there.
Cosmic
Here is one I started that deals with Torq Thrust II's but it applys to fitting rims of any kind: http://forums.corvetteforum.com/show...5&forum_id=119
You should find all the info you need there.
Cosmic
Melting Slicks
Joined: May 2001
Posts: 2,812
Likes: 4
From: Gig Harbor Wa
Seriously, though, if you want larger diameter, there are no modifications necessary, just get an 8" wide rim with 4" backspacing and a tire in the 245 or 255 range. Pick the aspect ratio to give you an overall diameter between 26 and 27"
If you want to increase width as well, you may run into some issues with fitment. "Max width" is determined by how wide of tires you want and the diameter. As you go larger in diameter you can tuck more wheel under the fender without offset trailing arms.
If you want to increase width as well, you may run into some issues with fitment. "Max width" is determined by how wide of tires you want and the diameter. As you go larger in diameter you can tuck more wheel under the fender without offset trailing arms.
Race Director
Joined: Nov 2000
Posts: 11,872
Likes: 12
From: Waterloo ontario Canada
Often you will find that the 18 inch rims actually clear things better then the 15 inch. Springs are an example.
I went 18 inch all around with 40 series tires so a decent sidewall.
I went 18 inch all around with 40 series tires so a decent sidewall.
Intermediate
Joined: Mar 2005
Posts: 26
Likes: 0
From: England, UK Somerset
Best tyre size for 18", if you want to match the factory rolling diameter, is 255/45 R18. It's about 0.04 difference to a 255/60 R15 which was the factory tyre on later C3's. You may have to remove some of the front arch returns to stop rubbing (which the factory apparently did on later C3's), but it's easy enough to do. Also may get rubbing against the chassis rails at the front on amsolute full lock, but again easy to live with.
