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Old Dec 8, 2022 | 05:44 PM
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I changed the rears from 8" wide to 9" wide wheels with 275/40-18 tires. Kumho's Ecsta PS91 Max Performance Summer tire

Had to cut the parking brake brackets and still need to get those welded.



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Old Dec 8, 2022 | 06:35 PM
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Nice!
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Old Dec 8, 2022 | 09:05 PM
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They look great.....just try to avoid deep puddles of water on streets to keep the rear tires from "floating".
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Old Dec 21, 2022 | 12:02 PM
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Originally Posted by doorgunner
They look great.....just try to avoid deep puddles of water on streets to keep the rear tires from "floating".
watch the rocks kicking up with those wide tires 😬
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Old Dec 21, 2022 | 01:04 PM
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Originally Posted by ddawson
I changed the rears from 8" wide to 9" wide wheels with 275/40-18 tires. Kumho's Ecsta PS91 Max Performance Summer tire

Had to cut the parking brake brackets and still need to get those welded.



Nice work
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Old Dec 23, 2022 | 01:55 AM
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Originally Posted by ddawson
I changed the rears from 8" wide to 9" wide wheels with 275/40-18 tires. Kumho's Ecsta PS91 Max Performance Summer tire

Had to cut the parking brake brackets and still need to get those welded.



What backspacing on the wheels that required moving the parking / emergency cable.

I have 18x 9.5 wheels with 4.75" Backspacing and didn't need to modify anything. same 275 40R 18" tires.


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Old Dec 23, 2022 | 02:12 AM
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Old Dec 23, 2022 | 08:37 AM
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Looks great!

Question:
For those that have composite springs with either 18x 9 or 9.5" rims with 4.5 or 4.75" backspacing on 275 40R 18" tires, did the spring need to be shorted 1/2"-1"?
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Old Dec 23, 2022 | 09:32 AM
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Originally Posted by Maymyvetteliveforevr
Looks great!

Question:
For those that have composite springs with either 18x 9 or 9.5" rims with 4.5 or 4.75" backspacing on 275 40R 18" tires, did the spring need to be shorted 1/2"-1"?
Buy the wheels you like in a size that looks good to you. Then you can answer your own question when they are on the car. You can then buy a shortened spring if need be.
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Old Dec 23, 2022 | 10:54 AM
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That's sick, dude.
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Old Dec 23, 2022 | 11:47 AM
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Originally Posted by Maymyvetteliveforevr
Looks great!

Question:
For those that have composite springs with either 18x 9 or 9.5" rims with 4.5 or 4.75" backspacing on 275 40R 18" tires, did the spring need to be shorted 1/2"-1"?
This is using the VB&P street & slalom kit when it was available. No modifications required.


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Old Dec 23, 2022 | 05:58 PM
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Originally Posted by cagotzmann
What backspacing on the wheels that required moving the parking / emergency cable.

I have 18x 9.5 wheels with 4.75" Backspacing and didn't need to modify anything. same 275 40R 18" tires.

They are 5" backspace or 0 offset.
https://www.summitracing.com/parts/are-vn5158961

The tire fit but had very little room until contact. I'll post a picture with the bracket removed showing how much space is there now.
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Old Dec 24, 2022 | 12:06 PM
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Originally Posted by How Are You
Buy the wheels you like in a size that looks good to you. Then you can answer your own question when they are on the car. You can then buy a shortened spring if need be.
Rims and tires won't be purchased for another year. Rear end is apart and I want to be prepared so I won't have any surprises in the future.

Originally Posted by cagotzmann
This is using the VB&P street & slalom kit when it was available. No modifications required.
Thank you for the photo, rear e-brake has been relocated. It seems I will go with the standard spring size.

Originally Posted by ddawson
They are 5" backspace or 0 offset.

The tire fit but had very little room until contact. I'll post a picture with the bracket removed showing how much space is there now.
Looking forward to the picture.
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Old Dec 24, 2022 | 12:15 PM
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I don't think any tires on a car could look more perfect on the car than what Cagotzman has on his. Every time I see that picture......I think, yes...THAT is what a C3 Corvette should be running on.
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Old Dec 25, 2022 | 12:27 AM
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A few pictures. Shows the small spacer just to move the wheels out a small amount. Also how much space with the bracket cut "not welded LOL"







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Old Dec 28, 2022 | 03:14 PM
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My favorite wheel/tire combo is the plain 'ol Corvette Rally wheels with 255/60/15 tires, but I do admit that tire choice is quite limited. 18" wheels open C3 Corvette owners up to a whole new world of available tire choices (after working out the backspacing and resolving any rubbing issues).

IMO, 18" is the absolute limit, however, as anything larger starts to look Hooptie-ish (for lack of a better term) and really destroys the classiness of the car. Something about filling those wheel wells with 'sidewall' as opposed to 'rim', or a good balance of both, just looks right. Again - just my opinion.
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Old Dec 28, 2022 | 07:18 PM
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Dan

I have to say pictures of your car with those 18's on them, when you put them on years ago.....has always inspired me to consider 18's.....they just look right on your car. I am considering them for my 69 convertible....although I will be satisifed with the 8 inch wheels all around.

Last edited by Shovels and Vettes; Dec 29, 2022 at 04:49 AM.
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Old Dec 28, 2022 | 09:14 PM
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Thanks, my wife HATES the red ring so those are coming off. I won't miss cleaning the white letters on the old setup.
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Old Dec 30, 2022 | 07:43 AM
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i guess im old school !!!
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