[jjromano]

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?

 

[douger]

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.

 

[bcamaroz]

A good deal is a good deal, but the best choice for your Cadillac is leave the 55s and sell the 65 goodyears. http://gmpowerhouses.blogspot.com/

 

[FunkZ]

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.

 

[jjromano]

thank you for the responses!

 

[JCBCTS]

Would the taller tires void the warranty? Your odometer would be out of sync as well.

 

[tinman]

I can't see that even Cadillac would void a warranty over tires.

 

[JCBCTS]

So this is a good trick to to get 10% additional Warranty time from each car? Buy taller tires that understate the mileage?

 

[snafu]

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:

 

[Scotch_Mc]

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.

 

[snafu]

Scotch_Mc,

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

Snafu

 

[zeevert]

When your speedo reads 70mph, you'll actually be going about 75mph.

 

[HurstGN]

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