wheel/tire fitment
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Cadillac STS Forum - 2005 through 2012 Discussion, wheel/tire fitment in Past Cadillac Vehicle Discussion; I've been searching the forum but haven't really found a clear cut answer. I've got an 05 sts v6 (daily ...
  1. #1
    The_Punisher is offline Cadillac Owners Member
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    wheel/tire fitment

    I've been searching the forum but haven't really found a clear cut answer. I've got an 05 sts v6 (daily driver) I'mlooking to install a set of 20" wheels, I don't want them to stick out but also don'twant the high offset like the stocks. What wheel width and offset would be suitable? And also tire sizes? ...as I said this is my dd, my actual toy is my 2010 370 z, I'mrunning a 20 x 10/20 x12 wheelsetup on that.
    Thanks

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  3. #2
    The_Punisher is offline Cadillac Owners Member
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    Re: wheel/tire fitment

    Nobody can give any insight on wheel width and offsets?

  4. #3
    Four Fins's Avatar
    Four Fins is offline Cadillac Owners Member
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    Re: wheel/tire fitment

    I don't have an exact offset on mine, but I'm running 20x9 front and 20x10 rear 3 piece wheels. 1 inch lip in front and 2 inch lip in back. Fits perfect. 245/35-20 front and 275/30-20 rear.

  5. #4
    06 STS Rob's Avatar
    06 STS Rob is online now Cadillac Owners Fanatic
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    Re: wheel/tire fitment

    I was running 20x8.5 with 35mm offset kmc dimes on my 06 V6. There are several threads here on this topic. I have posted pics of it on the 22" thread as well. They fit pretty nice with the 255/35/20 nitto555's.

  6. #5
    The_Punisher is offline Cadillac Owners Member
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    Re: wheel/tire fitment

    I have been contemplating a staggered setup, so 19x8.5 front and 19x9.5 rear. Since I know the front will be ok, what would the ideal offset be on the 9.5 rear? + 40?

  7. #6
    DBB
    DBB is offline Cadillac Owners Member
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    Quote Originally Posted by The_Punisher View Post
    I have been contemplating a staggered setup, so 19x8.5 front and 19x9.5 rear. Since I know the front will be ok, what would the ideal offset be on the 9.5 rear? + 40?
    I'm in the exact same boat as you. I'm going with a staggered look a well. Same dimensions. The offset or the rear is +45. The rear dimensions are the same as a 2006 STS V. I'm going with 245/35/19 in front and 275/40/19 in the rear. My only concern is wearing through tires quicker than normal since the rotations would be limited with a staggered look. Without research I'm assuming that at these tire sizes that the tread would be directional so no rotation at all vs non staggered whereas tires can be rotated. Someone please correct me if I'm wrong,

    Thanks,
    DBB

  8. #7
    Ludacrisvp's Avatar
    Ludacrisvp is offline Cadillac Owners Connoisseur
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    Re: wheel/tire fitment

    A lot of STS came stock with a staggered setup so no rotation possible.
    it is what it is.

    Mine are staggered and directional.

  9. #8
    DBB
    DBB is offline Cadillac Owners Member
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    Quote Originally Posted by Ludacrisvp View Post
    A lot of STS came stock with a staggered setup so no rotation possible.
    it is what it is.

    Mine are staggered and directional.
    Thanks Luda.

  10. #9
    DBB
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    Okay I need some clarification. I want to put staggered 19''s on my 2005 STS v6. I've received advice for three different tire size combination.
    1. 245/35/19 front & 275/40/19 rear-from wheel guy

    2. 245/40/19 front & 275/35/19 rear- from discount tire direct live salesperson

    3. 255/40/19 front & 285/30/19 rear - discount tire direct website based on 2005 STS V6 specs

    Which set up of the above three will give me the best cosmetic look with less adverse affect on performance?

    Any advice would be greatly appreciated.

    Thanks,
    DBB

  11. #10
    EChas3's Avatar
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    Re: wheel/tire fitment

    Make sure to match tire circumfrance to within 1% (or diameter varience under 0.4%) or Stability Control may give you trouble. Other than that, go nuts!
    is3_ftw and is3_ftw like this.

  12. #11
    DBB
    DBB is offline Cadillac Owners Member
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    Re: wheel/tire fitment

    Quote Originally Posted by EChas3 View Post
    Make sure to match tire circumfrance to within 1% (or diameter varience under 0.4%) or Stability Control may give you trouble. Other than that, go nuts!
    Thanks, and could you elaborate? I'm not totally following, but I definitely want to understand to ensure I'm not headed for double.

  13. #12
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
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    He's referring to the outside diameters of the front vs rear tires. The measurements have to be VERY close (within 1/4" or so) to each other, and also to that of the original tires.

  14. #13
    Guy.Seminerio is online now Cadillac Owners Connoisseur
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    Re: wheel/tire fitment

    Is it that or is it that whatever changes he makes say to the front shouldn't deviate more than 1/4 in than what is stock, and same for the back, in order to avoid issues with stability control?

  15. #14
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
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    Both. I edited my post.

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    Guy.Seminerio is online now Cadillac Owners Connoisseur
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    Re: wheel/tire fitment

    Wasn't sure myself so good to know.

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