Glossary
Thermal pressure rise
The increase in tire pressure that occurs as the tire heats up during operation. A commercial truck tire typically shows 10–20 PSI above its cold reading after highway operation. This increase is normal and expected. Hot pressure readings should not be used to adjust inflation downward — doing so results in the tire being underinflated when it cools.
Real-World Use
A driver checking tires at a fuel stop after two hours of highway driving finds one tire reading 15 PSI above target and considers releasing air — instead, he notes the reading and waits for a cold check at the destination.
What to Pair It With
Read this term with the full tire sidewall, vehicle rating information, manufacturer documentation, and the actual condition of the tire.
This site is for general information only. It does not replace professional tire service, DOT compliance advice, tire manufacturer instructions, vehicle manufacturer recommendations, or fleet policy.