Calculating the correct tire pressure to use

[Tireman9]

Originally Posted by Pick

I run my new Towmasters at 55# road side and 60# curb side. They ran at around 110* temp measured with infrared thermometer, on a 500 mile trip to the Florida Keys this past week. Also FYI the Towmasters are rated at 75 MPH max speed vs Marathons at 65 MPH.

All tires on an axle should be inflated to the same cold (ambient) inflation.

I see only one Towmaster rated above 65 and many at only 62 (100 KPH)

[slowmover]

btt

[interstateflyer]

I've noticed that 50 psi cold at sea level at ambient 65F is 54-55F at 6,000 to 7,000 feet.

Should while touring should I deflate to 50 psi cold at 7,000 feet if I'm hanging around there for a day or two?