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Old 01-09-2019, 08:56 PM   #1
Shawnqa800720
 
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Drives: 2018 1SS
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18" rims fit a 2018 1SS

Hi,

I searched the forums (albeit not extremely thoroughly - as my wife would say, I did a "man" search), and couldn't find a definitive answer as to whether you can run 18" rims on a 6th Gen SS. I have an 18 1SS that is going to be my daily driver, and I live north of Boston.

I want to run 18 x 8 or 8.5 for winter tires, but can't get a straight answer out of any national tire shop - online or in store. They all hem and haw about brake clearance, saying it "should" work, but won't commit.

Can someone here give me a definitive answer? Will it fit, and what offset is required to make it work?

Much appreciated!!
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2018 Red Hot 1SS, GM lowering kit & 1LE Sway bar kit, ZL1 1LE solid rear cradle bushings, BMR sway bar end links, GM CAI w/tune, Pray ported IM, Mamo ported TB, VS Forged VS07 rims 20x11 & 20x10 w/ Michelin PS4S
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Old 01-09-2019, 09:18 PM   #2
KirkH


 
Drives: 2016 2SS M6 Mosaic Blk Met-SOLD
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I have a set of 18" OEM wheels that I got super cheap on eBay. I hoped to use them as "learners" at the drag strip. They do rub a little bit when I back up and turn sharply.
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Old 01-09-2019, 10:07 PM   #3
Wiskey
 
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This is from memory, and a long time ago, but my understanding is that it's not about offset between stock 20 and stock 18 wheels but it depends on which breaks you have on your car. If I remember right the most expensive brembos wouldn't fit in the stock LT 18" wheels. The lowest stock breaks on the 1LT definitely do because I have them, but I think (and I am really not positive) the lower end brembos do too.

Do you know which breaks you have?

Whiskey
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Old 01-10-2019, 06:12 AM   #4
Shawnqa800720
 
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Quote:
Originally Posted by Wiskey View Post
This is from memory, and a long time ago, but my understanding is that it's not about offset between stock 20 and stock 18 wheels but it depends on which breaks you have on your car. If I remember right the most expensive brembos wouldn't fit in the stock LT 18" wheels. The lowest stock breaks on the 1LT definitely do because I have them, but I think (and I am really not positive) the lower end brembos do too.

Do you know which breaks you have?

Whiskey

The Brembo performance brakes 4 piston front and rear according to the window sticker
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Old 01-10-2019, 08:02 AM   #5
DeadEcho
 
Drives: 2018 Camaro 2SS Redline
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I used 18" BMW replicas for winter tires when I first got my car. They fit fine over the stock 4 piston brembos!
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Old 01-10-2019, 09:44 AM   #6
Shawnqa800720
 
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Quote:
Originally Posted by DeadEcho View Post
I used 18" BMW replicas for winter tires when I first got my car. They fit fine over the stock 4 piston brembos!


Do you know what the offset was on those rims for comparison?
Thanks!
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2018 Red Hot 1SS, GM lowering kit & 1LE Sway bar kit, ZL1 1LE solid rear cradle bushings, BMR sway bar end links, GM CAI w/tune, Pray ported IM, Mamo ported TB, VS Forged VS07 rims 20x11 & 20x10 w/ Michelin PS4S
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Old 01-11-2019, 02:22 PM   #7
Apex Wheels

 
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Our 18x8.5" wheels do fit your car, with the offsets being +35mm. You can find more information at this link: https://www.apexraceparts.com/shop-b..._wheel_width=8

- Cory
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