wheel spacer ?
Le Mans Master
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
C4 and C5 have the same off set. The tire diameter of the 18 is one inch taller. You could lowering bolts to drop rear of car, to compensate for taller tire.
Last edited by Kevova; May 6, 2016 at 02:46 PM.
Le Mans Master
Joined: Jun 2009
Posts: 6,528
Likes: 752
From: South Dakota
The offset difference is 9 mm. That would make them fit the same position as the OEM C4 17" x 9.5" wheels.
However, that is an odd spacer size due to lug studs. It is a little too much for just using a spacer without adding longer lugs, and an adapter will have the studs stick through them so that the wheel may hit them and not fit without shortening the studs.
The stock rear wheel specs are below.
88-96 base
17"x 9.5"- 56mm
C5 base
18"x 9.5"- 65mm
Good luck.
However, that is an odd spacer size due to lug studs. It is a little too much for just using a spacer without adding longer lugs, and an adapter will have the studs stick through them so that the wheel may hit them and not fit without shortening the studs.
The stock rear wheel specs are below.
88-96 base
17"x 9.5"- 56mm
C5 base
18"x 9.5"- 65mm
Good luck.
Team Owner
Joined: Sep 2003
Posts: 25,389
Likes: 2,741
I would use a 19mm adapter/spacer and that would "boost" the rears 10mm further "outboard" than your original 9.5 @ 56mm. That would be a very satisfactory appearance for a C4 and still be well within the wheelhouse. I suggested 19mm because it's a readily available "on the shelf" from most suppliers.
The thin-spokes I'm quite sure have a recess between the stud holes so there should be no issues.
The thin-spokes I'm quite sure have a recess between the stud holes so there should be no issues.
Team Owner
Joined: Sep 2003
Posts: 25,389
Likes: 2,741
I really believe the 19mm adapter/spacer would make you happier after done.
Check one of the C5 wheels for the recesses between wheel stud holes.
Another thing to consider is that the spacer (both but certainly the 10mm) will use nearly all of the bearing hub dimension that makes the wheels hub-centric to the car. You'll loose that feature because the wheel center-bore is actually a taper for the first few mm.
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