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Ok so from my searching it looks like the bolt patter is 5x4.75 and a 15x10 will fit with some caliper grinding with a 6.5 back spacing on 85+ corvettes.
I have a 84 and to use the the 90 corvette saw blades and my C5 vetter wheels I need to use wheel spacers to set them out far enough. So does anyone know what back space wheel fits an 84 corvette without spacers. Or should I just run my spacers with the 6.5 back spacing.
Ok so from my searching it looks like the bolt patter is 5x4.75 and a 15x10 will fit with some caliper grinding with a 6.5 back spacing on 85+ corvettes.
I have a 84 and to use the the 90 corvette saw blades and my C5 vetter wheels I need to use wheel spacers to set them out far enough. So does anyone know what back space wheel fits an 84 corvette without spacers. Or should I just run my spacers with the 6.5 back spacing.
I believe your 84 has the same backspacing as my 86. 16x8.5" rims are 32mm backspace while 16x9.5" are +38mm backspacing. If you pull a wheel, I believe it should be cast on the inside of the rims.
I used that along with others to figure out mine when I upgraded earlier this year. Went from 16x9.5 +38 with 245x50zr16 tires to 18x9.5" +40mm C6 Z06 replica rims with 255x40zr18 tires. Fit like a glove. Same diameter, same basic depth and width as the oem wheels. I personally don't like to use spacers so this my best solution.
If you plan to use those C5 rims, pretty sure you're going to have to use spacers as I believe they are +56mm backspacing. Can't tell you the thickness needed but IIRC others have said it's around 3/4".
To use factory C5 rims you'll need the adapter as the offset is 56mm and you'll need 38mm (or very close).
You can find manufacturers who make C5-style rims in those offsets if you like. Look at OEWheels. Remember, you want an adapter and not a "spacer" if you go that route.
I already have the c5 wheels with adapters. I am wanting to buy a Jegs 15x10 drag wheel for my drag radials and need to know if the 6.5 back spacing is what I need for the 8 corvette without using spacers.
So what back spacing is required for 15x10 for flush fitment
If the wheel you want is available in a 7" BS that would be as close to be a considered ideal match. It would split the 1/2 difference equally with a 6.35mm (1/4") loss of inner clearance when compared to a 9.5" early C4 and push the outer 6.35mm (1/4").
You haven't defined "flush" so it's impossible to calculate that for you.
Fitment is generally more accurately calculated using a specific tire/wheel combination undersatnding the math involved and "do it yourself".
wheel fitment question
