Circling back to provide yet another perspective in answer to DH3's thrice repeated question concerning running 120 PSI tires at 60 PSI when unloaded... doing so as a hot shot driver could lead to an 8 point (Severe) Out Of Service violation if found during a roadside inspection by a DOT officer.

In our Brave New World, Big Brother, in the form of the Federal Motor Carrier Safety Administration, has instituted a big data driven safety compliance and enforcement program, called “Compliance Safety Accountability.” or "CSA", which used to be called “Comprehensive Safety Analysis", before the FMCSA figured out a way to hold motor carriers and their drivers individually, severally, and collectively responsible, as the case and law may be, for their respective accountabilities in promoting and preserving highway safety.

CSA replaced the SafeStat system and is designed to track all carriers, all drivers, and all violations, not just the most severe ones. Drivers are monitored and tracked, and if a driver drives a vehicle that is non-compliant, it doesn't just count against the fleet owner... it counts against the driver too.





Observe that running the tire pressure at 1/2 the sidewall maximum pressure is the most severe violation, weighted at 8.

Compare this high severity to actually overloading the tire with too much weight over and above the tire's capacity rating, which is a much less severe violation, only weighted at 3.

That disparity in severity indicates how seriously the Feds view running a 120 psi max sidewall pressure commercial truck tire at 60 psi.

CSA Compliance, Safety, Accountability

What is CSA? Factsheet