Tire pressure question

[thewarden]

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[Action]

The window for correct tire pressure can be determined several ways.

Using load/pressure tables from the tire manufacturer. One needs to know the load being applied to each tire. And because things change, knowing the max load possible being applied to each tire. And adding a margin.
Measuring the increased tire temperature after towing for 30 minutes from a cold tire. From memory I believe a 10% or less increase is desired. And doing a forum search will yield the answer as well.

Since you have modified the tires and wheels to a larger size that has a greater load capacity, inflating to max tire side wall pressure is likely too much. However you did not state the exact tire so pulling data is not possible. Airstream would have used a pressure very close to the limit on the stock tires. Because the load capacity of the stock tires was very close to the loaded limit of the travel trailer. (with some margin) The trailer load is supported by the air in the tire. The tire contains that air. However if the tire has the ability to support more load with greater air pressure and doesn't have that greater load, the air pressure needed to support the actual load is all that is needed.

Having the correct pressure or enough pressure reduces interply shear. There will always be interply shear in place because the trailer wheels do not follow a curve when turning the tires. The tires are being dragged to some degree around the turn. For the sake of interply shear only, .... having too much tire pressure in the tire is a good thing. However having too much pressure in the tire has different negative outcomes.

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