rockstar9537912

Hey I have a question for anyone who may know. I'm wanting to upgrade the rims on my 84. I've done a lot of research on the funky offsets and use of wheel adapters and whatnot. However I did see that the C6 Z06 style rim, which is the style I want is offered with a 40mm offset. My 84 has a 38mm. Before I spend the money I guess I wanted to ask if those 2mm make that much of a difference or not? Any suggestions are much appreciated! Thanks!

Kubs

2mm is 0.08 inches. It will not make a difference.

WVZR-1

Good to see someone that does the "research" - I'm of course guessing but I imagine you're looking at a 9.5" wheel and maybe 18"? Your challenge is going to be maybe the speedometer calibration depending on the tire size you choose. You've got the offset stuff figured out though it seems. What tire are anticipating?

Kubs

The C6 Z front wheels are 18x9.5 with 40mm offset. I have 6 of them for my race car. If you go with a 275/35/18 or a 285/35/18 tire you will not throw off the speedo at all, and they fit nice on the wheel.

WVZR-1

The 285 is nearly a direct match but the 275 is a manageable differential. Either would be a mount and check by GPS. Not knowing the rolling radius of the choice it's not possible to calculate the true difference but using advertised dimensions of each the difference is manageable.

No particular cause for concern if it's the tire choice the OP makes.

rockstar9537912

Yes I was looking at 18" rims. I have the stock 16"s on it now. The plan was to put a lower profile tire on to try to keep the overall circumference basically the same to try to avoid that problem. I'm somewhat new to customizing cars so I'm still learning lol. My uncle did the same thing with his 95 when he put his rims on and didn't have any problems, so I've been getting some advice from him, but the weird offsets he didn't know too much about since his are more 'normal' than mine.

rockstar9537912

p.s. I do appreciate all your help!

hemivett

Mine are off a stock 02', and have a 1" spacer in front, and a 3/16 in the rear. Prbly could have done without the rear spacer, but went with these guys recommendations here on the forum. They fit well, and look nice, but tire dealers wont touch the car with spacers, (a little heads up to those considering this route) I really like the 5 spoke look, but wish I could have afforded to have them without spacers.......To answer your Q though 2mm isnt nothing to worry about......As far as tires go anyway! h

Some closer pics http://s1310.beta.photobucket.com/us...tml?sort=3&o=4

WVZR-1

Sort it out yourself and learn "the math" involved for offsets and back-spacing etc. Can't stress enough "learn the math" there's way to much erroneous information out there in some of the "calculators". Math can be fun!

jhammons01

Go here......The bottom of the page has a tire size calculator....all you have to do is find the right OD of an 18" tire and your Speedo will not be changed

http://www.joby.se/corvette/div/corvette_wheels/

WVZR-1

Ya'll just leave the "kid alone" I believe he's "got it"!

rrt898

I agree, I have the same offset on my 86. I also have 18 x 9.5 all around without a problem. There isn't alot out there with our offset unless you use adapters and or spacers, which I am not a fan of.

good luck