Which Circle Should I Look at on the Tire Pressure Gauge?

[PeytonMarie]

Tire pressure gauges can display readings on either the inner or outer circle, with the difference lying in the units of measurement. The outer circle uses the imperial unit psi, while the inner circle uses kg/cm2. The conversion formula between them is 14.5psi = 1.02kg/cm2. For instance, if the tire pressure gauge reads 2.5, it refers to the black inner circle. Here are more details: Classification of tire pressure gauges: Tire pressure gauges can be categorized into dial-type, digital, and alarm-type gauges, each with its own advantages and disadvantages. Dial-type gauges are convenient to use, requiring only a connection to the tire valve for pressure measurement, but they may lack precision and could show slight deviations.