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Technical Rear tire size dilemma on kustom (49 Chevy)

Discussion in 'Traditional Customs' started by Madmath, Oct 23, 2020.

  1. Hi guys,

    I have a dilemma to choose a good combination of tires for my 49 Chevy.

    What I want :
    Bias ply (at worst Bias Look Radial) on 15" wheels with wide white walls, now I have 6.70/15 ones.

    For the front I think it's the good size for my project but at rear, it's a little too tall (it rubs in wheel arch, raised arch wheels).
    I checked a lot on Coker Tires but not sure what could be the best choice.

    I also would like to keep the same sidewall style and width, at least visually.

    I saw the BF Goodrich - 2 5/8 Inch Whitewall - 600-15, it seems to have the ideal proportions but it's not the most beautiful and the 670-15 (for the front) doesn't have the same sidewall style.

    I also saw the Firestone - 2 3/4 Inch Whitewall - 640-15 but I think it will remains a little too tall and also not the same sidewall that the 670-15.

    Do you think smaller (600-15 or 640-15) will be ugly if I put same 4 tires ?
    Do you have return (and maybe pics) of kustom with smaller rear tires ?

    The fender skirt will hide almost all the tire.

    Thanks for your returns.

    test.jpg mini-20200514_162550.jpg
  2. Moriarity
    Joined: Apr 11, 2001
    Posts: 19,171

    Staff Member

    I assume your car is on air bags? If so, does it matter that the tire touches the inner wheelhouse when deflated? You probably won't or can't drive it at that height anyhow so why not just put the 6.70's on it all around. If not, my 40 ford has 5.90 15 bfg silvertowns on the front.... that is a pretty tiny tire though....
  3. Yes, I'm on air bags but I would like to gain 1" more, I made a lot of job for that :D
    And to be honest, the wheel arches are raised but the tire also touches the rear since I moved the rearend with the new fender skirt design
    5.90 are really tinny yes, I'm afraid that will be too narrow to cruise safely ;)
    chryslerfan55 likes this.
  4. I would try to put the same tire on all 4 wheels. 670-15 is a cool looking tire. Your car is not small so it needs adequate tires. Too small looks stupid if you don't build a lowrider.
    A smaller rear tire than front tire also does not sound like a great solution.
    If the wheel arch is too small for a tire that fits your car you might have a problem, IMHO.
    Last edited: Oct 23, 2020

  5. Elcohaulic
    Joined: Dec 27, 2017
    Posts: 1,321


    From what I read people seem to like Diamond back tires..
    Madmath and chryslerfan55 like this.
  6. williebill
    Joined: Mar 1, 2004
    Posts: 2,606


    Your car has a beautiful profile.. I really like the look, and the chop
    VANDENPLAS and Madmath like this.
  7. ZZ Top Chop
    Joined: Aug 12, 2018
    Posts: 395

    ZZ Top Chop

    You should look into Diamond Backs.These are the Auburn Deluxe Series.More expensive than Coker, but my opinion, they are a better tire. 20201007_143628.jpeg

    Sent from my SM-A102U using The H.A.M.B. mobile app
  8. Firestone 670-15 with a 3 1/4" whitewall on all corners. Done.
    chryslerfan55 likes this.
  9. Yes, I agree with you concerning the too small tires, that's why I would like to keep 6.70 in front.
    In rear, I would like too but not possible... my arches are upraised to the maximum and I really want to drop the car at maximum ;)
    Of course, I will try to keep a wide tread width

    Thanks, I checked and I'm interested... I will think about that ;)

    If it's was possible yes.
    For front, sure it's what I want... but for rear the top of the fender is at 28" from the ground and the car need to go down about 1"1/2 so I have about 26" maximum for my tire and the 670-15 is 28.58"

  10. Moriarity
    Joined: Apr 11, 2001
    Posts: 19,171

    Staff Member

    I don’t know how Coker is measuring tires but my 6.70’s on my outlaw clone are 27.25

    990694A4-D7EE-4D5F-8023-7BFFF695E3DC.jpeg A99259F1-09E5-46E6-AB8F-93902B3412CF.jpeg
  11. Ho yes, big difference :/
    VANDENPLAS likes this.
  12. I have 6.70 15 BF Goodrich Silvertown on my Merc and they look good. They also measure about 27.2 (69 cm). IMG_20201024_195428439.jpeg 2020-10-24-20-02-03.jpeg

    Sent from my Moto G (5S) using The H.A.M.B. mobile app
    williebill and Moriarity like this.
  13. If you want to drag the frame, get out the cutting torch and raise the fenders. Look at the math for what you want to do. You can’t very well cut off the tops of your tires. 6.70-15 is a good tire size for your car.

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