Adam is right.  If you have genuine Corvette 7" wheels, they are worth enough to sell and buy correct 8" wheels.  However, the vast majority of 7" ralley wheels are the Monte Carlo style, with different backspacing, which makes all the other advice above not apply in your case.  Get the code off them and Google it to be sure.

Larry

Go 15 X 8 and enjoy the ride!

Forgot to mention, I have the original 15X8 aluminum wheels on the car now with 255/60/15's.  I have no problems or clearance issues with them.  I found a nice set of keystone classic rims for a great price that are the 15X7 that I was inquiring about.  I was just wondering what the biggest size tire I can get to put on the 15X7's.   Thanks to all for you continued help! 

Be careful with any aftermarket rims you buy.  You may need spacers with them to clear the calipers as well as longer lug nuts to go with them.  If you do require spacers, don't get aluminum, get steel.  Aluminum spacers will crack very easily if torqued too tightly.

On a 15"x7" rim, you'll be pushing it if you mount 60 series tires...maybe a small 60 series might work.  The wide tread on a too narrow rim will cause the tires to wear quickly in the center unless you underinflate them, and that cause poor handling characteristics and excessive heat buildup.  I would stick with 70 series tires on a 15"x7". 

Like these?


As Bruce(gunslinger) says,watch out for the backspacing. Aftermarket rims for Corvettes are tricky when it comes to clearing the calipers.

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Joel Adams
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Yes Apple, those are the exact rims I am looking at!

Apple, what size tires would you recommend for these keystone rims that you have shown, 15X7 rims?  Thanks!

As Bruce mentioned, I'd have to say stay with a 70 series tire...anything wider than that is not gonna fit on the rims properly. If your 255 tires are clearing now, a 235/245-70 should be just aboot right.
I'm not a tire eggspert, so don't take this as gospel...

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Joel Adams
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Thank you everyone for all of your great help!  I have an additional question. The original wheels I have on it now are 5X4.75" or 5x120.7.  I have found a nice set of 15X8J rims that are 5X4.50".  Would these work and can you please tell me what the 4.75" or 4.50" measurement actually means?  Thanks again to all of you!

That means the bolt pattern measurement. The holes are either 4 1/2" center/center, or 4 3/4" center/center. If you measure your rims, start on one stud, then to the stud 2 studs over from that. That gives you the bolt pattern of the rim.
Don't quote me, but I think Corvette used a 4 3/4" pattern...

There was a post here a while back that gave a link to a really good site that had all kinds of rim/tire info, such as how to determine backspacing, bolt patterns, etc. It's been a while since I've seen it...prolly a year or so.

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Joel Adams
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Your Vette uses a 4 3/4" bolt circle. Those 15"x8" with a 4 1/2" bolt circle won't work. That fits Ford, Mopar, AMC, Studebaker and maybe a few more.