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Discussion Starter · #1 ·
After reading several threads on this I didn't find any conclusive offset size that work for sedans.

I think when these originally came out they were 20x10 +43 but I read some had milled the center down etc.

What was ever finalized as the set up for sedans?

Front
20x9 Offset ?
20X10 Offset ?

Rear
20x10 Offset ?
20x11 Offset ?

Looking at some more posts I see one set was for sale with +25 and it poked out about a half inch.
I am thinking I can get by with 20x9 +33 in the front and 20x10 +43 in the back?
 

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Discussion Starter · #2 ·
Well.
Spoke with best wheel deal and ill say I'm even more confused.

Here is where I am at though.

Coupe wheels with a 285 30 on a lowered sedan seem to work from several threads I have researched.

Coupe wheels are 19x10 +40 so I think a z28 20x10+43 would be fine and actually fit 3mm better.

Still working on fronts.
Stock are 19x9 +51 which is a 7inch backspace.
Best wheel deal said his 20x9 +35 fit perfectly but that offset based on the chart would be about 6.3 inch backspacing thus bringing the wheels out towards the wheel well more..

I found 20x9 +30 which appears to be the most common size.

This is feeling like when I put 5th gen ss wheels on my G8.
 

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Discussion Starter · #3 ·
Disregard I'm gonna go with OE creation Corvette Grand sport Rims 19x10 squared. +56
Backspacing is 7.7 thus if I'm calculating correctly that means 7/10ths of that inch extra is going towards the strut and 3/10ths towards the fender.
These will also fit better than the coupe wheel in the rear.

187.00 each in black so I'm going to order them up and ill report back :)
 

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Discussion Starter · #4 ·
Over here just chatting with myself :)

Grandsport wheels are discontinued :(

C7 ZR1 wheels are next on the list.

19x10 +56 all the way around

Compared to stock fronts the wheel will poke out 8mm more and 18mm closer to the strut. Eyeball measurement inside the wheel well says I will be fine :)
Stock rears 6mm closer to the strut and 6mm closer to the fender.


These are available LOL.
 

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Discussion Starter · #5 ·
FYI. I picked up 18x9.5 +40 zr1 wheels.
23.00 each with free shipping.
I thought it was a typo but both wheels showed up today so I guess not. I thought for sure my transaction wod be cancelled as usually they are 250 ish each.

They fit really nice. Maybe 1-2 mm further out than the stock wheels in the front.. sit flush with the fender.

Ordered two 19x10 +56 for the back.
 

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I have a thread with a lot of this info though for a coupe. fronts are the same… Also coupe rears on the front. Skip to the TL;DR

 
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