Wheel Fitment
Thread Starter
Instructor
Joined: Dec 2010
Posts: 168
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From: Paris Ontario
Wheel Fitment
First of all this is my first post here after purchasing my first Corvette a few days ago. I purchased a 1984 Red C4.
I'm sure this topic has been beaten to death, but my search results didn't help too much. What wheels fit an early C4? I'd hate to go out and buy some sweet C5 or C6 wheels and end up not being able to bolt them on, easily or have them ruin my performance. At the same time I'm not a fan of salad shooters... Any help for this noob C4 owner would be appreciated.
I'm sure this topic has been beaten to death, but my search results didn't help too much. What wheels fit an early C4? I'd hate to go out and buy some sweet C5 or C6 wheels and end up not being able to bolt them on, easily or have them ruin my performance. At the same time I'm not a fan of salad shooters... Any help for this noob C4 owner would be appreciated.
Racer
Joined: Nov 2010
Posts: 356
Likes: 1
From: Tahlequah ok
First off let me say welcome to the forum
and here are a few links to great info in regard to this
Read this one first (the part about the wheel offsets):
http://forums.corvetteforum.com/c4-t...lar-basis.html
http://forums.corvetteforum.com/c4-g...c4-84-z51.html
http://forums.corvetteforum.com/c4-g...t-on-87-a.html
and here are a few links to great info in regard to thisRead this one first (the part about the wheel offsets):
http://forums.corvetteforum.com/c4-t...lar-basis.html
http://forums.corvetteforum.com/c4-g...c4-84-z51.html
http://forums.corvetteforum.com/c4-g...t-on-87-a.html
Last edited by usmc_butler; Dec 15, 2010 at 03:18 PM.
Racer
Joined: Nov 2010
Posts: 356
Likes: 1
From: Tahlequah ok
Im doing the same thing to my 87 and we are going to have the same issue... I have my new C5 wheels and tires mounted up. My plan of attack is going to be to jack up one side of the car remove the factory wheels and put the new ones on, then take a tape measure and measure the distance from the tire outward to my upper fenders and that will give me my spacer thickness that i will need I will take some pictures when I do this, this seems to be a common issue with pre 88 C4 owners
I will take some pictures when I do this, this seems to be a common issue with pre 88 C4 owners
Team Owner
Joined: Dec 1999
Posts: 34,873
Likes: 487
From: Lacey WA RVN 68-69
NCM Sinkhole Donor
Im doing the same thing to my 87 and we are going to have the same issue... I have my new C5 wheels and tires mounted up. My plan of attack is going to be to jack up one side of the car remove the factory wheels and put the new ones on, then take a tape measure and measure the distance from the tire outward to my upper fenders and that will give me my spacer thickness that i will need I will take some pictures when I do this, this seems to be a common issue with pre 88 C4 owners
I will take some pictures when I do this, this seems to be a common issue with pre 88 C4 owners56mm -38mm = 18mm which is 3/4"
Racer
Joined: Nov 2010
Posts: 356
Likes: 1
From: Tahlequah ok
If you are using the front wheels from a C5, those have an offset of 56mm just like the 88-96 C4 wheels. The 84-87 cars used wheels with a 38mm offset. To get the 56mm offset wheels to sit in the wheelwell like the stock 16's, you need 3/4" adapters.
56mm -38mm = 18mm which is 3/4"
56mm -38mm = 18mm which is 3/4"
Thank ya sir
Team Owner
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From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
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Welcome to the CF, you can also check the CFI forum moderated by Mr. Thailand.
Safety Car
Joined: Jun 2009
Posts: 4,738
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From: OC Calif
St. Jude Donor '10
If you are using the front wheels from a C5, those have an offset of 56mm just like the 88-96 C4 wheels. The 84-87 cars used wheels with a 38mm offset. To get the 56mm offset wheels to sit in the wheelwell like the stock 16's, you need 3/4" adapters.
56mm -38mm = 18mm which is 3/4"
56mm -38mm = 18mm which is 3/4"
Use 1" adapters.
The rears from C5 are 63mm- but you'll be fine using the same 1" adapter.
C6 fronts are the same as C5. C6 Rears are 79mm and would require a 1-1/2" adapter.
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Thread Starter
Instructor
Joined: Dec 2010
Posts: 168
Likes: 0
From: Paris Ontario
C4 Cruiser that was the answer I was looking for. Thank you!
USMC - I saw your post as well, and am thinking of picking up the same wheels and having them powder coated. I'll be patiently waiting to see pics! Thanks man.
I did have an offer to trade 89 wheels (no tires) for my 84 wheels. Looks like I still need spacers and tires though. So... C5 5 spoke I think I'll be looking for.
USMC - I saw your post as well, and am thinking of picking up the same wheels and having them powder coated. I'll be patiently waiting to see pics! Thanks man.
I did have an offer to trade 89 wheels (no tires) for my 84 wheels. Looks like I still need spacers and tires though. So... C5 5 spoke I think I'll be looking for.
Thread Starter
Instructor
Joined: Dec 2010
Posts: 168
Likes: 0
From: Paris Ontario
I picked up a set of almost new '99 wagon wheels. 17x8.5 front & 18x9.5 rear. If I do the math I need a .75" spacer front & 1.25" spacer on the rear. Is that correct?
If I did go 1" all around will the back wheels sit inside too much?
I'm running 275/40 18 rear & 245/45 17 front fro tires on these wheels.
If I did go 1" all around will the back wheels sit inside too much?
I'm running 275/40 18 rear & 245/45 17 front fro tires on these wheels.
