How accurate are the tire gauges?
All Accu-Gage® 1-1/2″, 2″ and 2-1/2″ dial tire gauges are ANSI Commerical Grade B gauges (meets ANSI B40.1 Grade B specifications), which is the best quality gauge typically used for tire pressure applications. These tire gauges use a fully geared, solid brass precision movement with bronze bourdon tube. Unlike piston-plunger-type gauges, the bourdon tube movement is not affected by changes in temperature, humidity, altitude or air stream contaminants. The mechanical accuracy rating is ± 2% from 25% to 75% of scale and ± 3% below 25% and above 75%.
