C6 wheels
Le Mans Master
Joined: Aug 2015
Posts: 6,086
Likes: 1,972
From: St. Charles MO
You can probably use the sizes marshallnoise mentioned, but 1.75" in the back will probably be a little better. I assume we're talking about base-model wheels? 18x8.5 et56 front and 19x10 et79 rear? Because the fatter Z06 wheels aren't really going to work at all.
What tire sizes do you plan to run? The stock 245/40/18 tires on C6 fronts should work fine on a C4. The stock 285/35/19 will be too tall for proper C4 fitment. You'd really want 285/30/19 instead.
What tire sizes do you plan to run? The stock 245/40/18 tires on C6 fronts should work fine on a C4. The stock 285/35/19 will be too tall for proper C4 fitment. You'd really want 285/30/19 instead.
Drifting
Joined: Jun 2020
Posts: 1,690
Likes: 726
From: Stay dangerous my friends
The C6 wide body (ZR1 Z06 GS) front wheels should fit the early C4 like your 1987 fine all around. If you can see my avatar, those are C6 wide body spec 18" front wheels installed in all 4 positions on the 1986.
The C6 narrow body wheels would be better suited for 1988+ rather than the 1987, same as the C5 fitment, and on the 1987 perhaps you would only want those for looks and not what I would call proper fitment having to use substantial spacers. But I see it done all the time.
The C6 narrow body wheels would be better suited for 1988+ rather than the 1987, same as the C5 fitment, and on the 1987 perhaps you would only want those for looks and not what I would call proper fitment having to use substantial spacers. But I see it done all the time.
Last edited by AZSP33D; Mar 21, 2026 at 09:47 AM.
Le Mans Master
Joined: Aug 2015
Posts: 6,086
Likes: 1,972
From: St. Charles MO
Originally Posted by AZSP33D
The C6 wide body (ZR1 Z06 GS) front wheels should fit the early C4 like your 1987 fine all around. If you can see my avatar, those are C6 wide body spec 18" front wheels installed in all 4 positions on the 1986.
Le Mans Master
Joined: Aug 2015
Posts: 6,086
Likes: 1,972
From: St. Charles MO
305/30/19 is really too wide for 10" rim width: although you can mount most 305s on them (good luck with a Bridgestone RE71RS though), they won't work great. At 26.2" tall, they are also on the verge of being too tall for a C4. Tire manufacturer's rim width recs for this size are 10.5-11.5. 315/30/19 would be an even worse fit for 10" rim width, and at 26.6" diameter, it's too tall to work well on a C4. I recommend against that.
Pro
Joined: Sep 2024
Posts: 526
Likes: 114
305/30/19 is really too wide for 10" rim width: although you can mount most 305s on them (good luck with a Bridgestone RE71RS though), they won't work great. At 26.2" tall, they are also on the verge of being too tall for a C4. Tire manufacturer's rim width recs for this size are 10.5-11.5. 315/30/19 would be an even worse fit for 10" rim width, and at 26.6" diameter, it's too tall to work well on a C4. I recommend against that.
Probably depends on what you are doing with the car too. I am not turning corners with it but plan on going in a straight line and cruising on the streets.
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