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Thread: Tire Question

  1. #1
    Yaemish is offline Cadillac Owners Connoisseur
    Automobile(s): 02 Seville, 04 SRX
    Join Date
    Sep 2003

    Tire Question

    Sorry to be posting here, I would jsut like to get some more eyes, some of you may not read the Seville\Eldorado forum. I have a 96 Eldorado.

    I just picked up some 18"x7.5" wheels and I need to buy some tires this morning. A lot of guys have been helping me decide and I really appreciate it. says that I can go with a 245/45/18 or a 235/50/18. The only difference is that the 45/18 is going to have a difference from the original diameter of .23% (60mph will be 59.8) and the 50/18 is going to be 2.32% (60 mph will be 58.6).

    I am leaning toward the 50/18 based on ride quality, price, and selection. I would just like to know if I am going to take a huge performance hit with the 2.32% and will my mileage really die if I am getting about 22-23 mpg on my 16s?

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  3. #2
    Dadillac's Avatar
    Dadillac is offline Cadillac Owners Connoisseur
    Automobile(s): 2015 Mazda3 S GT Hatchback 2013 Kia Optima SXL
    Join Date
    Nov 2004
    Woodbridge NJ

    Re: Tire Question

    I answered your question in the Seville / Eldorado forum. Get the 245/45/18 if your current tires are 225/60/16. Get the 235/50/18 if your current tires are 235/60/16.


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