How to Read a Tire Pressure Gauge?
3 Answers
To read a tire pressure gauge: The central axis of the gauge's measuring port forms an angle of 90 to 180 degrees with the body axis of the gauge. The scale is a rectangular prism, with a range of 0.07 to 0.4 WPa. Before taking a reading, tap the instrument casing with your finger to eliminate friction in the transmission mechanism. When the pointer overlaps with the mirrored pointer, the value indicated by the pointer is the pressure reading, accurate to one decimal place. Also, read the temperature value on the gauge, precise to one decimal place. Align and press the measuring end slot of the gauge firmly against the tire valve stem. The deflection of the pointer indicates the inflation pressure of the tire. Normal tire pressure range: According to the international standard GBT2978-2008, the recommended tire pressures are as follows: Standard tires: 2.4-2.5 bar; Reinforced tires: 2.8-2.9 bar; Maximum pressure: should not exceed 3.5 bar.
I usually use a dial-type tire pressure gauge to check the tire pressure myself. First, unscrew the plastic cap on the tire valve stem, then press the gauge's nozzle firmly onto the valve stem until you hear a hissing sound, indicating a good seal. At this point, the dial needle will suddenly jump up and stop at the current tire pressure reading. For example, if the needle points to 35 psi, I compare it with the recommended value on the door frame sticker—my car's standard is 32 psi, which means I need to release some air. Don’t forget to screw the valve cap back on to prevent dust after checking. Remember to measure when the tires are cold, as driving heats them up and increases the pressure. I also make it a habit to recheck the first tire after measuring all four to ensure the readings are stable. In summer, tire pressure tends to rise, so I check it monthly.
A seasoned road trip enthusiast shares how to read a tire pressure gauge. I always carry a digital tire pressure gauge in my backpack—the LCD screen is easier to read than analog dials. Press the power button, align it tightly with the valve stem for three seconds, and the screen will display the reading directly. My gauge shows dual units: 2.5 bar corresponds to 36 psi. Key points: check the maximum pressure marked on the tire sidewall and the recommended value on the door label—never exceed the upper limit. Before measuring, kick the tire to ensure no stones are stuck. Always check tire pressure before long trips—once before heading to Tibet, I found the right front tire underinflated; topping it up saved me a liter of fuel per 100 km. Don’t forget to check the spare tire’s pressure—it’s often overlooked. In cold weather, tire pressure drops; I add 0.2 bar every winter.
