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  1. #1
    Senior Member reisertracing's Avatar
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    Default Treaded to Slicks

    Being new to CF, what adjustments do I need to make to the car to go from Vintage treaded tires to slicks?

    Thanks
    Johhny Reisert

  2. #2
    Contributing Member Lotus7's Avatar
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    Default

    Assuming you are switching to scca legal slicks, which are radials, as a minimum you'll want lots more camber, like 3-3.5 degrees vs 0.5 degrees, and you'll also want to check ride height due to diameter differences. Radials want slightly higher hot pressure.
    Secondary changes once you've driven it may be spring and bar rates.
    Ian Macpherson
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    Race prep, support, and engineering.

  3. #3
    Contributing Member DanW's Avatar
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    Default

    Quote Originally Posted by reisertracing View Post
    Being new to CF, what adjustments do I need to make to the car to go from Vintage treaded tires to slicks?

    Thanks
    What tires do your local groups require? Most spec Hoosier R60 or American Racer (Mcreary) bias ply.
    “Racing makes heroin addiction look like a vague wish for something salty.” -Peter Egan

  4. #4
    Senior Member AlanVDW's Avatar
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    NEDIV CF Rules are: "Tire choice is restricted to three (3) racing slick options: Goodyear 600,Hoosier 60, American Racer AR133."
    I believe all are bias ply.
    I went from slicks to the treaded Hoosier VFF (due to cost), which are legal for CFF in the northeast. If you run on the SCCA spec radial, your in FF.

    All I did was take out the camber to run the tread VFF tire. Just add camber and you should be OK to run slicks.
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  5. #5
    Member Jake King's Avatar
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    Quote Originally Posted by AlanVDW View Post
    NEDIV CF Rules are: "Tire choice is restricted to three (3) racing slick options: Goodyear 600,Hoosier 60, American Racer AR133."
    I believe all are bias ply.
    I went from slicks to the treaded Hoosier VFF (due to cost), which are legal for CFF in the northeast. If you run on the SCCA spec radial, your in FF.

    All I did was take out the camber to run the tread VFF tire. Just add camber and you should be OK to run slicks.
    There are also some differences in tire diameter. I believe the front treaded tires are ~7/8" taller and the difference in the rears are marginal. May need to adjust your front ride height to match the rake you run with the treaded tires.

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