Tire pressures, what to expect

[Tireman9]

Originally Posted by slow

I set my air pressures 5 psi below max when the ambient temperature first thing in the morning at daylight is 15 C (~60F). That is the typical temp for us in the mornings when we set off towing. I am comfortable with the 5 psi below max since a 10 F temp rise brings them up to max. This way I do not have to keep adjusting the air pressure the entire season.

I do not know why so many people thing under inflating their tires is a good idea. Every mile you run underinflated does some additional damage to your structure.


With my recommended +10% you have plenty of room for daily changes without having to mess with your tires. Just NEVER run lower than the MINIMUM inflation based on scale measured load and the info in the tables.


Tires can tolerate a significant increase in pressure. We tire engineers know that and design and test accordingly.