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Tire Pressure

R

Ron7000

Member
I purchased new Carlisle tires for my NAA. The rear tires, Carlisle CSL24, indicates a maximum pressure of 26PSI. The front tires, Carlisle
Farm Specialist F2 indicates a maximum pressure of 52PSI.

I contacted Carlisle as to what to use and they said to use the maximum pressure "No more and no less"

I ran my old tires at 10-12PSI in the rear and 25PSI in the front.

I have always been told to not run tires at the maximum pressure. Any comments?
 

Your owners manual should give you a range of pressures according to what you are pulling, how heavy you have it ballasted, and what weight you may be carrying on the hitch.
 

I always run enough air in the back ones so when you park it on cement the outer edge of the bars on the tires are about a quarter of a inch up off the concrete. The fronts about 28 lbs.
 
As per the NAA owners manual and this is a true one no a reprint 10-28 tires need 12 PSI which in today's numbers are 11.2X28. Front tires 5.50X16 28psi
 
Like anything else that is manufactured they have to set limits. With tires they don't know what vehicle they will be put on. This is why the vehicle mfg states their limits (such as tire pressure) for best performance of their vehicle. The larger the tire the lower the air pressure is required to hold up the vehicle. Because you have more square inches inside the tire for the compressed air to push on.
 
I use whatever pressure it takes to keep the tread flat on the ground and keep the sidewalls from wrinkling up when pulling. Somewhere around 15psi usually. Depends on the tractor and what it's used for. When I was in my teens and plowing with our JD720 we had to keep 30psi so the loaded 15.5s wouldn't wrinkle up.
 
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