Does Climate/Temperature Effect a Trailer Tires Maximum psi  

Question:

Expert Reply:

Trailer tires should always be inflated to their maximum air pressure. As you noted, the sidewall of the # AM10295 tire that you purchased lists the tire's max as 95psi, and you will want to inflate the tire to 95 psi.

The rule of thumb on tire pressure change due to air temperature is 1 psi for every 10 degrees (Fahrenheit) in temperature change. In the desert regions I would think 50 to 60 degrees (Fahrenheit) would be an average temperature change from day and night, meaning a psi change of 5-6 psi. Since tires can handle being over-inflated better than they can being under-inflated, it is best to inflate to the max psi and test the tire pressure in the morning when the temperature is lower and the tires are cold, before towing the trailer.

As the day goes on and the temperature and movement of the tires heat up, the psi will change. At night, the temps will lower again and allow the tires to return to their normal max psi.

For your tires, the max load at a mas psi is 3,640 pounds at 95psi, or 3,200 pounds at 95psi for dual tire applications. At the maximum air pressure, the tires will perform and wear best, and get the best gas mileage.

If a trailer tire is inflated to a lower air pressure than the maximum, the amount of weight that the tire can carry will be reduced.

I have linked a help article on special trailer tires for you.

expert reply by: Victoria B

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