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 > What size were the super-wide tires the 70s Fords had?

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Sportsman Matt

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Posted: 05/03/08 02:53pm Link  |  Quote  |  Print  |  Notify Moderator

Also word of caution back in the day, you had a 16" and a 16 1/2" rims and tires and often someone would mistakenly put a 16 1/2" tire on a 16" rim and watch it blow out on the road at normal travel speed. You had to make sure that the rim was 16" or 16 1/2" and put only the specific tire for it on there.


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Don87401

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Posted: 05/03/08 03:45pm Link  |  Quote  |  Print  |  Notify Moderator

My 1974 F250 came stock with 9.5 X 16.5 all around. The long wheel base F350 from that era came with 12 x 16.5 in the rear I do not know what was on the front for sure but I think it was the 9.5 x 16.5. The older 8 lug bolt pattern is different than the newer fords not sure of which year they changed.


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Posted: 05/03/08 05:14pm Link  |  Quote  |  Print  |  Notify Moderator

I ran BFG Mud Terrains, 33x12.5x16.5's, on my old 72.



JoeChiOhki

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Posted: 05/03/08 07:32pm Link  |  Quote  |  Print  |  Notify Moderator

I am familiar with the bead flange difference on the older tires, since these are meant for long heavy hauls vs beach running and will only be used during the times where I will need the extra wheel capacity.

The two brands of specialty tires I found for those specific rims (Which I haven't purchased yet, still checking things out) are both meant for those specific rims. They are 12 ply Load Range F & Load Range G tires. Through research, I tracked down the bolt pattern and measurements for the dana 60 axle that is on the truck the rims I am looking at came off of. They are the same as the dana 60 that is on my Dodge, and before cash ever changes hands, I will pull a tire off and attempt to bolt one of these big beasts on to make sure it will fit.

The other thing I read on these tires was that the minimum air down pressure could be no lower than 25psi. Lower and the tire will slip the bead. For the use I would be running these on (6000 miles of asphalt), I do not think this would be a problem. Btw, that max load PSI for those tires is 75.


Again, nothing is being bought, yet. Once I can get some $$ figures outside the purchase price of $60 for the rims with M/S tires already on them (Though old, don't trust the tires on the rims) I will be able to make a final call and see if I choose to go through with the Super Single endeavour.

I can safely say that if it even comes close to what Jefe spent, then it will be a moot project as I do not intend to spend $900 for 2 tires.


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Hoss427

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Posted: 05/03/08 10:26pm Link  |  Quote  |  Print  |  Notify Moderator

JoeChiOhki wrote:

Been oddly curious what those old fatty rears you used to see on Ford 1-ton camper specials back in the 70s were.

Also, were they 8 bolt or 10 bolt?

Just pondering some odd ideas, and one was getting a set of old fatty rear rims for camper running when I'm going extra heavy to help spread the load.

EDIT: Removed misconception about Split rims


Joe I had 3 of those One Ton Fords with the long 140" wheel base,standard cab, back in 1975. We bought them to carry heavy loads. The wheel base on those trucks as I mentioned were 140" compared to the standard at that time 133" ford wheel base. The tire sizes were 12.00 X 16.5 on the rear with 8 hole lugs. The fronts had 9.50 X 16.5. The were NOT split rimmed. The would hold a lot of weight I will give them that. But....if you spit on the ground without a load on it they would get stuck, had NO traction. Other than that I loved the trucks. They would carry a tremendous amount of weight. The spare tire was mounted in the side of the bed.

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Posted: 05/03/08 11:38pm Link  |  Quote  |  Print  |  Notify Moderator

Don87401 wrote:

The older 8 lug bolt pattern is different than the newer fords not sure of which year they changed.
Ford changed to the metric 8x170mm hub-centered wheel/hub bolt pattern starting in '99. Previous to that they were lug-centered 8x6.5" bolt pattern with 9/16" studs.


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JoeChiOhki

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Posted: 05/04/08 12:08am Link  |  Quote  |  Print  |  Notify Moderator

Hoss427 wrote:

JoeChiOhki wrote:

Been oddly curious what those old fatty rears you used to see on Ford 1-ton camper specials back in the 70s were.

Also, were they 8 bolt or 10 bolt?

Just pondering some odd ideas, and one was getting a set of old fatty rear rims for camper running when I'm going extra heavy to help spread the load.

EDIT: Removed misconception about Split rims


Joe I had 3 of those One Ton Fords with the long 140" wheel base,standard cab, back in 1975. We bought them to carry heavy loads. The wheel base on those trucks as I mentioned were 140" compared to the standard at that time 133" ford wheel base. The tire sizes were 12.00 X 16.5 on the rear with 8 hole lugs. The fronts had 9.50 X 16.5. The were NOT split rimmed. The would hold a lot of weight I will give them that. But....if you spit on the ground without a load on it they would get stuck, had NO traction. Other than that I loved the trucks. They would carry a tremendous amount of weight. The spare tire was mounted in the side of the bed.


Yeah, they do have the floating problem with the huge contact patch. But, I do have 4 wheel drive and the existing tires would be the same diameter as the fatties, so in lower traction situations I can use the 4 wheel to compensate.

Another thing I may or may not have noted is that these fat tires would not be on the truck full-time. I would still be using the regular rears when not using the camper to eliminate the floation problem, and also to save the tires tread life for as long as possible.

They'd basically go on for the camper season and then spend the winter in a nice storage shed out of the suns light and the weathers wrath.

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