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Old 06-27-2013, 08:38 PM   #1
41plym
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Default model a tire pressure

What's the correct tire pressure for 4 ply 4.75x19 tires?
thanks
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Old 06-27-2013, 09:28 PM   #2
davehc
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Default Re: model a tire pressure

35 pounds
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Old 06-27-2013, 10:02 PM   #3
glenn in camino
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Default Re: model a tire pressure

On my 30 deluxe delivery and my 28 station wagon I run 35lbs in front and 40lbs on the rear. When loaded for tours they're both heavier in the rear. works good.
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Old 06-28-2013, 09:00 AM   #4
marc hildebrant
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Default Re: model a tire pressure

41plym,

The owners manual suggests 35 lbs. A reproduction of the manual is available from the Model A suppiers for a small charge.

Lots of good info inside !

Marc
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Old 06-28-2013, 01:28 PM   #5
jadatis
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Default Re: model a tire pressure

also for old timers tire pressure-advice is based on load in the tire.
I once got hold of the formula for radial tires, but the basic formula is introduced in 1928 for diagonal tires, and later chanched for radial tires in its power used .

So if you can give actual load on tires and kind of tires, I can calculate the needed pressure for you . 2ply is probably pressure needed for the maximum load of lower then 35 psi but I can be wrong about that. 35 psi is what is used for P-tires radial , and is called B-load , so I interpolated of 6ply/C-load 50 psi , 8ply/D-load 65 psi.

I think there does not have to be an adding for above 99m/h , also no adding for camber-angle ( alighment tires like this on the axle /-\ instead of |-|.
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Old 06-28-2013, 02:18 PM   #6
41plym
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Default Re: model a tire pressure

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Thank you.
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