Four gauges makes for a stressful life . :laughing: Sell all four and buy one good gauge by adding a few bucks in the hat. They ain't cheeeeep . Some of the racing folks can recommend good gauges I suspect . While you are buying go ahead and get the equalizer hose or make one . That way you'll know all the tires on a particular vehicle are equal or 2 front and 2 rear if desired . With my equalizer hose I can rob air from my wife's car tires to air my lawn tractor tires :thumbsup:
Went through a dozen until I broke down and got one from the Snap-On guy. Cost less than $20 if my memory is still with me.
+1I can't see a few psi from one gauge to the next would be any big thing. Just use the same gauge for all the tires on the same vehicle. Its a lot more important to have all tires with the same psi then a few psi one way or the other.