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Thread: C5 Z06 -- "Square Set Up"

  1. #1

    Question C5 Z06 -- "Square Set Up"

    Time to replace my tires on my 2003 Z06

    The problem is that I've got a Square Set-up. That is, 19" rims on all four locations (front & back)

    Front: Goodrich 275/30 ZR19
    Rear: Pirelli PZero 305/30 ZR19

    I would like to get Michelin on all four corners, but I've heard that if one is not careful, having 19's all-around could cause fault codes from the traction control, as the system is set for the original factory set-up, and cannot be changed.

    Any suggestions?
    Any cautions?
    Any warnings?

    Last edited by MJB Vette; 07-20-2017 at 09:35 AM.

  2. #2
    Join Date
    Dec 2011
    Washington State


    Have the 19" tires sizes on your vehicle now set any codes or messages? If not then you are within parameters. What you are looking to do in any tire/wheel combo is to be within a 1/4" to maybe 1/2" of difference in outside rolling diameter between the OEM size tire and the sizes the customer choses.
    20+ years ASE and Honda Master Tech

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  3. #3
    Join Date
    Dec 2011
    Southern California


    Just to be clear, you realize it's the tire circumference that matters, not wheel size. I know a few guys that run square on 18's with a couple of different tires with no issue. Also be aware under an extreme use of tc/ah, anything other than the sizes gm programmed the system may result in not optimal outcome, but this is unlikely in most driving scenarios. I have run anything but the spec'd sizes & never had a problem in 10 years.

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