Seville/STS Tire Size
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Suspension, Brakes and Tires Discussion, Seville/STS Tire Size in Item Specific Cadillac Discussion; Hi all, I'm wondering what the OEM tire size is on the 17" wheels which come off the 2001 STS? ...
  1. #1
    ddzc is offline Cadillac Owners Member
    Automobile(s): 2001 Cadillac STS
    Join Date
    Jan 2010
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    Seville/STS Tire Size

    Hi all,

    I'm wondering what the OEM tire size is on the 17" wheels which come off the 2001 STS? Is it 235/55/17? I'm picking up winter tires....would I be able to get away with 235/50/17 or 235/45/17? Would those tire sizes make noises, etc. I just want to triple check before buying...I'm leaning towards the 45 profile just to give it a sportier look and I found a nice used set...

    Thanks

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  3. #2
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
    Automobile(s): 2002.5 F55 STS/65500mi, 2004 Ford F150 SuperCab4x4
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    Re: Seville/STS Tire Size

    Quote Originally Posted by ddzc View Post
    Hi all,

    I'm wondering what the OEM tire size is on the 17" wheels which come off the 2001 STS? Is it 235/55/17? I'm picking up winter tires....would I be able to get away with 235/50/17 or 235/45/17? Would those tire sizes make noises, etc. I just want to triple check before buying...I'm leaning towards the 45 profile just to give it a sportier look and I found a nice used set...

    Thanks
    235/55/17, depending on speed limiter setting either an H or Z tire.

    Get into www.tirerack.com and look up the closest tire to your originals. Write down the rim width and outside diameter. Now look at your possible replacements - compare specs. As long as the outside diameter is within about 0.4" and the rim width is within 0.5" you should have no (or little) speedo error and no wheelwell rubbing problems. If treadwidth on the new tires is more than about 0.75" wider, you might have rubbing problems on tight turns.

    Better to stay with the 235/55/17's if the 50's or 45's fall outside the above. (45's are pushing the envelope here..............)

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