Its tire time.....
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2008-2013 Cadillac CTS General Discussion Discussion, Its tire time..... in Cadillac CTS Second Generation Forum - 2008-2013; First time poster with a 2011 CTS AWD Coupe. I am now at tire time and need to get some ...
  1. #1
    jspbtown is offline Cadillac Owners Member
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    Its tire time.....

    First time poster with a 2011 CTS AWD Coupe. I am now at tire time and need to get some more winter appropriate tires. As I have seen....and read through dozens of posts....the rear tire sizes are really limited. I would prefer to get a more snow capable time as the CTS is my winter vehicle.

    So here is my question.....

    On the factory rims can I go 245/45R18 up front and 275/40R18 out back?

    I want to use the factory rims and no spacers. The diameters seem to line up well front to back and I realize my speedo will be off a tad but I think the AWD will be OK given their rotations per mile similarities. The width is not that extreme of a difference so clearance should be OK.

    Any fatal flaw feedback?


    Thank you!!

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  3. #2
    wcthunder's Avatar
    wcthunder is offline Cadillac Owners Connoisseur
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    Re: Its tire time.....

    and ...lol here it comes!

  4. #3
    HurstGN's Avatar
    HurstGN is offline Cadillac Owners Connoisseur
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    Re: Its tire time.....

    Yea, the tires are very limited on a coupe.

  5. #4
    Long's Avatar
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    Re: Its tire time.....

    "Winter appropriate" tire shopping in May will make the selection a bit tougher...

  6. #5
    HurstGN's Avatar
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    Re: Its tire time.....

    With AWD, winter appropriate can be good all-season tires. The AWD setup is very good and a decent set of all-season tires gets me through winter.

  7. #6
    Long's Avatar
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    Re: Its tire time.....

    Quote Originally Posted by HurstGN View Post
    With AWD, winter appropriate can be good all-season tires. The AWD setup is very good and a decent set of all-season tires gets me through winter.
    Really? I had no idea.

  8. #7
    Padgett's Avatar
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    Re: Its tire time.....

    For winter tires on a V6 CTS AWD I'd put the same size on all four. The 1/2" stagger will not affect how it drives.

  9. #8
    CaddyFred's Avatar
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    Re: Its tire time.....

    The wider the tire, the worse it is in snow. FWIW.

  10. #9
    Padgett's Avatar
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    Re: Its tire time.....

    Agree even a 225x60 with a really open tread will work.

  11. #10
    silversport's Avatar
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    Re: Its tire time.....

    I would look on Tirerack's website as they have their own track and actually test tires in many conditions...take a look at what tires within your tire size range (I let the engineers do the masterminding here) and price points that perform best in light snow as well as other weather conditions you are likely to encounter as well as the type of driving you want to do in your CTS

    Bill
    CaddyFred likes this.

  12. #11
    Padgett's Avatar
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    Re: Its tire time.....

    Particularly if you scroll down on a particular tire there is a bar chart of tires rating for different conditions. Personally I look first for a "wet" rating of either over 9.0 or "excellent". Will admit a bias for BFGs (part of the Michelin group) that goes back to T/As in the '70s.

    For a number of years I preferred Michelins but like Optima the cost/benefit ratio now favors BFGs and Duracell AGMs.

    When in doubt, look at the tread. A more open pattern with be better in poor conditions just like a soft slick is best for dry track days.

    For my cars I prefer the BFG G-force Comp-2 A/S. It is a directional tire but IMNSHO worth it. See this review.

    ps the "A/S" part is important and has a UTQG of 400. This is not the plain "Comp-2" which is more of a track day tire.
    RedRover2018 likes this.

  13. #12
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    Re: Its tire time.....

    Look for the mountain/snowflake symbol when choosing snow capable all-season tires.

    https://www.tires-easy.com/blog/moun...wflake-symbol/
    silversport likes this.

  14. #13
    jspbtown is offline Cadillac Owners Member
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    Re: Its tire time.....

    Well I certainly appreciate all of the little nuggets of info. However I have been driving in the northeast for almost 40 years and am pretty familiar with tires and how to purchase them.

    My specific question was about the sizing and if anyone ever used alternate sizing to get more choices for tread type and manufacturer.

    I probably go through a set of tires every two years on my 4 cars so I understand them pretty well. I just am new to CTS ownership.

  15. #14
    Padgett's Avatar
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    Re: Its tire time.....

    And circling back I would put the same size tire on all four for inclement weather, look for an open tread pattern, and select a taller/narrower tire size to increase the contact patch load (psi). I would not go over a 235 section. There are many choices in the 225 and 235 sizes. Note that a 225/55R18 has a greater load rating than a 235/50R18.

  16. #15
    HurstGN's Avatar
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    Re: Its tire time.....

    I've seen 235/50-R18 & 255/45-R18 listed on the forum. I have not purchased my first set yet to know how close they are to stock and if they have any affect on the AWD setup. In theory, they shouldn't.

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