Just curious what kind of tires and what kind of weight requires 120PSI inflation? If the tires are rated at 120 psi max inflation, then they would only need this if the tires were carrying maximum rated weight capacity.
Hopefully everyone is inflating tires to match the manufacturors suggested iinflation for actual measured weight and hopefully, the tires aren't over loaded. My rear axle weights in at 19500 lbs and the tires in dual require 95 PSI for this weight. A reserve is suggested to ensure sufficient pressure between periodic checks so I run 100 PSI. 120PSI just seems scary!!!
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