66 Ranchero tire size

Discussion in 'General Ranchero Help' started by Jeffrey, Feb 4, 2019.

  1. Jeffrey

    Jeffrey In First Gear

    Messages:
    5
    Location:
    St. Louis, MO
    There are currently two sizes on the truck. G70 14 and F78 14. What is the original size? Would the equivalent be 225/70 R14? Thanks.
     
  2. 1979 RANCHERO GT

    1979 RANCHERO GT In Overdrive

    Messages:
    897
    My 79 original size was G78-14 and now it runs Cooper Cobra 225/70R14 . They seem to fit right without going to a 15" wheel. I would suspect your original size was 7.35-14 which would gone to F78-14 then to 205. I'd go with the 225, I think 205 and 215 would look a little small.
     
  3. PonyExpressRider

    PonyExpressRider In Overdrive

    Messages:
    891
    Location:
    Sutherlin, OR
    According to Ford Ranchero, Muscle portfolio, 1957-1979... the 1966 Wheels and Tires:

    Wheel size: 14x5J
    Optional Size: none
    Bolt no./circle dia: 5/4.5
    Tire make, Brand: Goodyear Power Cushion
    Size: 7.35-14
    Recommends inflation: 24/30
    capacity rating. total lb: 4080
     
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  4. Jeffrey

    Jeffrey In First Gear

    Messages:
    5
    Location:
    St. Louis, MO
    Thanks. I called CarX since they are down the road. They said to use a 235/60. Is that better than the 225/70? Why or why not?
     
  5. handy_andy_cv64

    handy_andy_cv64 In Maximum Overdrive SILVER MEMBER

    Messages:
    8,851
    Location:
    Everett, WA
    225/70 means the tread width is 225mm, and the sidewall height is 157.5mm; 235/60 is a 235mm wide tread and a 141mm sidewall height.
     
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  6. handy_andy_cv64

    handy_andy_cv64 In Maximum Overdrive SILVER MEMBER

    Messages:
    8,851
    Location:
    Everett, WA
    As far as which is better/worse, that's quite subjective, but I'd start with the tire price.
     
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  7. 1979 RANCHERO GT

    1979 RANCHERO GT In Overdrive

    Messages:
    897
    Go too big and you might have clearance issues rubbing the frame or fenders at the front wheels when steering.
     
  8. Carl Steinbarger

    Carl Steinbarger In Second Gear

    Messages:
    65
    Location:
    Dayton, Ohio
    I personally like taller sidewalls on older cars.. 75 or 80 series tires on stock width rims... But then again I'm old....
     
    Last edited: Feb 5, 2019
  9. colnago

    colnago In Overdrive

    Messages:
    673
    Location:
    Ridgecrest, CA
    Do you have manual or power steering? The PO of my '64 with manual steering had 225s in front, and found it too difficult to steer. He ended up putting 195s up front, and kept the 225s in the back.

    Just my two cents.

    Joseph
     
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  10. Carl Steinbarger

    Carl Steinbarger In Second Gear

    Messages:
    65
    Location:
    Dayton, Ohio
    I actually haven't driven mine yet because of all the snow and cold weather.. I have manual steering.. I'm using 185/75R14 on 4 1/2" wide front and 215/75R14 on 5" rims on back.. As soon as I get the steelies painted I'll post some pics... I'm partial to the older "look", steel wheels, dog dish and taller sidewall tires...
     
  11. Hillbilly

    Hillbilly In Maximum Overdrive

    Messages:
    5,491
    Location:
    Winchester, TN.
    Carl, while rubber band tires do give better handling, their ride comfort is pretty low. Like you, I have no plans to get rid of my tall sidewall tires because for my driving style I don't need to be able to feel a blade of grass on the pavement. Nice painted steel rims with maybe a pin stripe and baby moon caps along with a set of quality taller radial tires just looks period correct and the ride quality is excellent. The trick is finding quality radial tires in the sizes you want.
     
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  12. Carl Steinbarger

    Carl Steinbarger In Second Gear

    Messages:
    65
    Location:
    Dayton, Ohio
    "Jeffery", sorry to butt in on your original thread question.. I think "79 Ranchero GT" had the right answer..
     
  13. Kiwirancher

    Kiwirancher In Third Gear

    Messages:
    110
    Location:
    Gisborne , New Zealand .
    I am running 195/65 14's front and 215/70 14's rear on my 66. Slight rubber rake , they are on torque thrust 2's. Power steer so easy to drive. I am definitely a sidewall guy too. No rubber bands or as we tend to call them , Liquorice straps , for me !!
    Denis.
     
  14. Carl Steinbarger

    Carl Steinbarger In Second Gear

    Messages:
    65
    Location:
    Dayton, Ohio
    Like I said, I'm old and not in the know.. What are "rubber band" tires and "Liquorice straps"???
     
  15. TestDummy

    TestDummy In Maximum Overdrive SILVER MEMBER

    Messages:
    22,474
    Location:
    C'Ville
    Very little sidewall.
    [​IMG]
     
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  16. Carl Steinbarger

    Carl Steinbarger In Second Gear

    Messages:
    65
    Location:
    Dayton, Ohio
    Thanks man^^^, I feel smarter and younger already...
     
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  17. Jeffrey

    Jeffrey In First Gear

    Messages:
    5
    Location:
    St. Louis, MO
    I found 4 matching 225's. Hope they work out.
     
  18. Truckpoor

    Truckpoor In Second Gear

    Messages:
    28
    Can anyone tell me the the backspacing of the original wheels? Any problems going with 15's
    Thanks in advance,
    Rich
     

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