14.9-38 rear tire air pressure

steveinohio · May 31, 2010

My JD 630 has 14.9-38 rear tires loaded with calcium chloride solution. When I checked the air pressure it showed 14 lbs. I can't remember at this moment what the correct tire pressure should be. Can anyone out there give me some information regarding this? They are 6 ply tires.

Thanks!

DickL · May 31, 2010

14/15 would be where I would run them in the field.
Less if I was pulling a transfer sled.

old popper · May 31, 2010

Years ago a tire man told me that a good rule of thumb is 1# inflation for each inch of width.

thurlow · May 31, 2010

So..........24# for a 24.5; 30# for a 30.5??????

buickanddeere · May 31, 2010

14.9X38 bias can carry up to 2760 lbs at 12 psi inflation pressure.
Six ply max of 3740lbs at 20 psi.
Eight ply max of 4300lb at 24psi.
Ten ply 4940lb max at 32psi.

Depends on the soil surface and is the tractor pulling high draft loads? Front end loader?

14.9-38 rear tire air pressure

steveinohio

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DickL

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old popper

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thurlow

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buickanddeere

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