Tire plans for an 80Z

Discussion in 'Suspension, Steering, Brake & Wheel Topics' started by JD Z, Dec 5, 2017.

  1. JD Z

    JD Z Veteran Member

    From the feedback and research I’m thinking of putting this tire size on the car:

    Front 215/70/15 BFG TA Radial
    Rear 255/60/15 BFG TA Radial

    It has 235/60/15 on the front and 255/60/15 on the rear now. The front bottoms out easily on the 235/60’s. Feedback suggests that even the stock 225/70 had this problem. I think the overall height will look ok from the side. I think it will reduce the bottom out problem.

    My question is will this look odd? Will it help with the bottom out problem? Am I missing a concept to understand?

    Thanks a ton for your thoughts.
     

    Attached Files:

  2. smallhurst

    smallhurst Veteran Member Staff Member

    146
    0
    Oct 22, 2010
    lees summit,mo
    Contact me if you want. I have a couple of ideas. 816-654-3400.
     
  3. PalmbchZ28

    PalmbchZ28 Veteran Member Gold Member

    728
    308
    Jan 29, 2017
    West Palm Beach Fl
    JD I have a stock 1980 Z28 and the 225 70 R15 are not an issue on my car. The front has never bottomed out.
     
  4. JD Z

    JD Z Veteran Member

    Thanks guys.
     
  5. rchydzik

    rchydzik Veteran Member Lifetime Gold Member

    787
    14
    Nov 13, 1999
    Colbert, WA USA
    Check that your bumpstops are still on the A arms. They can rot and fall off. Without them, you might run into bottoming out on the tires.
     
    PalmbchZ28 likes this.
  6. silver81

    silver81 Veteran Member

    145
    5
    Mar 8, 2008
    Western Wyoming
    If what you mean by bottoming out is wheels rubbing inner fender wells in a corner, I had that problem in my 81 too. went to 235-60r15 and minimized the problem greatly. Diameter difference was about 5/8 inch. Problem was worse on pass side than drivers side. With wheels facing straight forward do your wheels look centered in the wheel wells or are they set back towards the rear some?
     
  7. RS1979

    RS1979 Veteran Member Lifetime Gold Member

    3,113
    430
    Jun 18, 2013
    Memphis, TN
    I put 235/60/15 on the front and 275/60/15 on the rear. I haven't had any problems at all
     

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