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2011 CTS AWD
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49 Posts
I currently have Michelin 235/55/17's on my CTS. A 6 month old set of Good Year 235/65/17's fell into my lap. The tires are perfect but I am not sure about the size difference.

Any issue putting these on the CTS?
 

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I currently have Michelin 235/55/17's on my CTS
A 6 month old set of Good Year 235/65/17's fell into my lap
The Tires are perfect but I am not sure about the size difference.

Any issue putting these on the CTS?
Your Goodyears will be a bit taller. You may have speedo issues and perhaps won't be happy with the handling.
 

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2009 CTS4 Premium & 2012 SRX4 Luxury
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605 Posts
That's nearly a 2" taller (diameter) tire. It's going to throw your speedo off by 7% (faster) and you very well could run into rubbing, especially when turning or hitting bumps.
 

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2008 CTS Base Manual Tran
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553 Posts
Would the taller tires void the warranty? Your odometer would be out of sync as well.
 

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'14 CTS-V LongRoof; '16 ATS-V Sedan,' 04 Trailblazer 4x4; '10 CTS LongRoof gone but never forgotten
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14,181 Posts
I can't see that even Cadillac would void a warranty over tires.
 

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2008 CTS Base Manual Tran
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553 Posts
So this is a good trick to to get 10% additional Warranty time from each car? Buy taller tires that understate the mileage?
 

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'11 CTS4 Coupe / SlushBox
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11 Posts
I currently have Michelin 235/55/17's on my CTS
A 6 month old set of Good Year 235/65/17's fell into my lap
The Tires are perfect but I am not sure about the size difference.

Any issue putting these on the CTS?
see if this link works. It's a cool tool although it's not displaying properly right now on my machine.

As for the tires....you didn't state the current condition or type (all season I'll assume) of the Michelins presently on the car. Tires aren't cheap to install and if you don't like them you'll be paying twice. Maybe consider selling the Goodyears and putting that to the right sized tire?
Although you may not notice, the taller tire will make it more difficult to get your CTS' 4k+ lbs rolling. Likely a heavier tire as well. If you're mostly city driving, it won't help your f/e any.
 

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08 CTS DI AWD Luxury-Performance II ThunderGray/Titanium
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135 Posts
Scotch_Mc,

did you have a Miata, I found this when I was in the Miata club (early 90's). great info.

Snafu
 

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2013 Black Diamond CTS4 Premium Coupe (sold-09 CTS4 DI Black Raven/Ebony)
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4,339 Posts
QUOTE=JCBCTS;14122105]So this is a good trick to to get 10% additional Warranty time from each car? Buy taller tires that understate the mileage?
Why not just trailer your car everywhere to maximize the warranty, LOL...:banana:
Because the warranty will still expire due to time. Ahaaaaaaa
 
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