28" Tire Diameter

Discussion in 'Suspension, Steering, Brake & Wheel Topics' started by bfmgoalie, Nov 24, 2017.

  1. bfmgoalie

    bfmgoalie Veteran Member

    Will a tire with a 28" diameter fit in the front of a stock '73?
     
  2. CorkyE

    CorkyE Veteran Member Lifetime Gold Member

    8,873
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    Nov 4, 2004
    Ringgold, GA
    I ran 235/70x15, which is 28" dia. That's a pretty big tire on the front, I had to massage the inner fender well with a BMF rubber hammer in a couple places, replace fender bolts with low profile bolts, but after that, no problem. Remember these old cars are not all alike, yours may work easier, or may not. That tire does fill up the hole. I can dig up a pic if you want.
     
  3. PBZ28

    PBZ28 New Member

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    Nov 3, 2017
    Did you have the same size in the rear 235/70R-15? I’m looking at a 28 inch diameter tire for the rear to help lower my highway rpm’s some. I can’t afford a lower rear gear change or an OD tranny right now. I hope this 28 inch tire diameter on 15 x 7 rim will help a little as a cheap short term solution. I have a 79 Z with a 383, th400, and 3.73 posi rear. At 55/60 mph it runs around 3k on the tac. How did it work on the rear for you? Thanks!
     
  4. Dave Nelson

    Dave Nelson Veteran Member Gold Member

    3,133
    373
    Dec 19, 2003
    Vineland N.J USA
    Brian, IMO a 28" tire would be too tall and may cause rubbing issues, I would look at a tire in the 26"-26"1/2 range. I run 26" front and 26"1/2 rear.
     
  5. BonzoHansen

    BonzoHansen Administrator Lifetime Gold Member

    considering 225/70/15s, about 27.5, came stock on some and they often rubbed....
     
  6. Goodwrench1965

    Goodwrench1965 Veteran Member

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    Apr 23, 2010
    Charlotte NC
    28 inch tall tires on the front will probably rub bad. I'm confident you could fix that with the right Springs. You certainly will get a smoother ride with a bigger diameter Tire and I'll bet they look good too. Of course you could just run regular size 26 inch tall tires on the front and put the 28 on the back and achieve your gearing goal without the headache of the rub in the front.
     
  7. PBZ28

    PBZ28 New Member

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    Nov 3, 2017
    That is exactly what I was thinking! I have stock springs front and rear and am hoping the 28 inch diameter tire on a stock 15 inch z28 rim will fit on the rear axle without any clearance issues. Anyone have 26 diameter tires in front and 28 inch diameter tires in the rear? Thanks!
     
  8. Goodwrench1965

    Goodwrench1965 Veteran Member

    843
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    Apr 23, 2010
    Charlotte NC
    My car has 26 / 27.5 combo in my signature picture.
     
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  9. CorkyE

    CorkyE Veteran Member Lifetime Gold Member

    8,873
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    Nov 4, 2004
    Ringgold, GA
    Yes, all 4 same size, no issues on rear.
     
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  10. PBZ28

    PBZ28 New Member

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    Nov 3, 2017
    Thank you!
     

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