Tire pressure, question on increase.
14,500 lb loaded trailer, Around 11,200 on 4 tires (7,000 lb axles). Goodyear G614 tires, about 3 years, 7000 miles on them. Ambient temperature: 78 degrees. After running 1 hour on mixed h...
Forum Discussion
When I am towing my 5th wheel the rear tires on my truck experience the greatest tire pressure change. They are also the tires loaded closest to the tire rating.
I get about a 12.5% change in pressure after 50 miles or so of towing.
I have the TST system and have found the tire temperature totally useless.
As per Goodyear tire pressure will change about 2 psi per 10 degrees F.
Thus when my tire goes from 80 psi to 90 psi then the tire temperature should increase by about 50 degrees F.
My TST system does not even come close to that. Typically it indicates about 10 to 15 degrees F above ambient.
The TST does not have any air exchange with the tire and is being cooled by a 60 mph ambient wind.
After 50 miles of towing I find my pressures on a given axle are typically within 2 psi provided they were the same when checked cold without any sunshine exposure.
I have found no noticeable change in pressure with the tires in the sun while I am going 60 mph down the road.
I get about a 12.5% change in pressure after 50 miles or so of towing.
I have the TST system and have found the tire temperature totally useless.
As per Goodyear tire pressure will change about 2 psi per 10 degrees F.
Thus when my tire goes from 80 psi to 90 psi then the tire temperature should increase by about 50 degrees F.
My TST system does not even come close to that. Typically it indicates about 10 to 15 degrees F above ambient.
The TST does not have any air exchange with the tire and is being cooled by a 60 mph ambient wind.
After 50 miles of towing I find my pressures on a given axle are typically within 2 psi provided they were the same when checked cold without any sunshine exposure.
I have found no noticeable change in pressure with the tires in the sun while I am going 60 mph down the road.
