compatibility with tires
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Cadillac STS Forum - 2005 through 2012 Discussion, compatibility with tires in Past Cadillac Vehicle Discussion; hello first time poster I have a question about what tire sizes are suitable with the sts I have a ...
  1. #1
    sueoc is offline Cadillac Owners Member
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    compatibility with tires

    hello first time poster
    I have a question about what tire sizes are suitable with the sts
    I have a 2005 v6 sts
    and changed the tires 2 days ago in the front 245/40 r17 91w
    and in the back 245/45 r17 95w Dunlop
    and since there has been steering wheel shaking/vibration when I hit speeds starting from 50-55 mph
    my question is are the tire sizes acceptable and is the vibration caused due to improper balancing or could it be another cause?

    thank you for any information

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  3. #2
    dannyquest is online now Cadillac Owners Fanatic
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    Re: compatibility with tires

    Are these new tire. For tire size on your car, look on the driver door jam. Danny

  4. #3
    1BadCadSTS's Avatar
    1BadCadSTS is online now Cadillac Owners Connoisseur
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    1st put the right size tires on

    2nd since these are incorrect tires ill assume they were a great deal and used.

    As such a flat spot broken belt or poor wheel balance could cause your issues.

    Happy hunting
    Ludacrisvp likes this.

  5. #4
    EChas3's Avatar
    EChas3 is online now Cadillac Owners Master
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    Re: compatibility with tires

    Replacing the bad tire(s) or wheel(s) will fix the vibration. I'd put a nickel on a belt separation, myself. I'd only buy used rubber to avoid replacing a full set, otherwise the first 10,000 miles are over half the value.

    All tires should be nominally the same size, but if the Stability System doesn't complain, you might get by

  6. #5
    fly187's Avatar
    fly187 is offline Cadillac Owners Member
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    Re: compatibility with tires

    IF those are brand new tires, then you need to take them back. If they are used tires, then that's why you don't buy used tires.
    daddy_o likes this.

  7. #6
    edoubble2082 is online now Cadillac Owners Member
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    Re: compatibility with tires

    Quote Originally Posted by fly187 View Post
    IF those are brand new tires, then you need to take them back. If they are used tires, then that's why you don't buy used tires.
    . That's completely false IMO I only buy used tires and have had no problems whatsoever these are heavy cars eat through tires and unfortunately I don't have the money to drop on new tires I got continental dws 55 45 with 80% tread yesterday for $60 a tire can't beat that My only suggestion if goin used is to at least replace set of 2 if staggered
    KRSTS likes this.

  8. #7
    Ludacrisvp's Avatar
    Ludacrisvp is offline Cadillac Owners Connoisseur
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    Re: compatibility with tires

    Used tires are one thing but at least get the proper size!
    edoubble2082 likes this.

  9. #8
    KRSTS is offline Cadillac Owners Enthusiast
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    Re: compatibility with tires

    Just check the DOT date of manufacture and make sure they are not too old. I wouldn't buy any over 3 years old.

  10. #9
    Nate540 is offline Cadillac Owners Member
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    Re: compatibility with tires

    The other problem is the diameter of those is wrong. Not only are they wrong they are not even the same overall diameter front to rear stock is 26" your rear is 25" and your front is 24" If you have a sts4 that is an even bigger problem as you wheels will be travailing a different RPMs front to rear. But at the very least your speedometer will not read right because of the height difference.

  11. #10
    malatu's Avatar
    malatu is offline Cadillac Owners Connoisseur
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    Re: compatibility with tires

    Never skimp on your shoes, tires or mattress!
    fly187 likes this.

  12. #11
    fly187's Avatar
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    Re: compatibility with tires

    Quote Originally Posted by edoubble2082 View Post
    . That's completely false IMO I only buy used tires and have had no problems whatsoever these are heavy cars eat through tires and unfortunately I don't have the money to drop on new tires I got continental dws 55 45 with 80% tread yesterday for $60 a tire can't beat that My only suggestion if goin used is to at least replace set of 2 if staggered
    LOL. You can't look at a tire and tell if it's good or not. Tires that you can tell are bad, are way beyond bad. There is a lot of used tires out their that are sold and are not good round tires. Buying new is the only way to go.

  13. #12
    daddy_o's Avatar
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    Re: compatibility with tires

    The last time I bought a used tire was for my 72 ford torino.

  14. #13
    funk_drum is offline Cadillac Owners Member
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    Re: compatibility with tires

    Quote Originally Posted by malatu View Post
    Never skimp on your shoes, tires or mattress!
    Or toilet paper!

  15. #14
    daddy_o's Avatar
    daddy_o is offline Cadillac Owners Fanatic
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    Re: compatibility with tires

    Quote Originally Posted by funk_drum View Post
    Or toilet paper!
    Forget the computer or the automobile, the greatest invention of the twentieth century was toilet paper on a roll.

  16. #15
    Guy.Seminerio is online now Cadillac Owners Connoisseur
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    Re: compatibility with tires

    Quote Originally Posted by funk_drum View Post
    Or toilet paper!
    That's my line. Here's proof. Last year. See post 15 and 16. You're new so I assume it's an original thought to you as well. Hell of a coincidence though!!

    http://www.cadillacforums.com/forums...313-tires.html

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