20 inch rims? Lift kit?

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Suspension, Brakes and Tires Discussion, 20 inch rims? Lift kit? in Item Specific Cadillac Discussion; I have a 97 seville sls I want to put 20 inch rims on it but im not very knowledgeable ...
  1. #1
    Sevilleslsstar is offline Cadillac Owners Member
    Automobile(s): 1997 Cadillac Seville SLS
    Join Date
    Jan 2012

    20 inch rims? Lift kit?

    I have a 97 seville sls I want to put 20 inch rims on it but im not very knowledgeable about suspension but will I need a lift kit for 20s

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  3. #2
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS - 67,500 miles, 2014 Explorer XLT FWD
    Join Date
    Feb 2006
    MD Eastern Shore, Kent Island

    Re: 20 inch rims? Lift kit?


    Take a look on your driver's door and write down the original tire size that came on the car. now go into www.tirerack.com and find that size tire in a Goodyear Eagle RS-series. Write down all the tire specs, especially the treadwidth (if any is listed) and the outside diameter. Now look at your desired 20" tires and find one that has VERY close to the same outside diameter as the originals - within +/- 0.3 inch. This will prevent engine controls and speedo errors. Treadwidth, rim width, offset, and section width determine if you will have rubbing problems in hard turns - too wide a tread is what rubs in fenderwells.

    If your car came with 16" wheels and tires with a 27.2" outside diameter you could run a 27" wheel (no tire) and still keep all the controls as built. The ride would be a bit choppy...........but you get the idea - as long as you keep the tire outside diameter and treadwidth close to stock you'll never need lift kits.

    The 20's WILL give you a harsher ride because there will be less air/rubber between the wheel and road.

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