1. Use a Reliable Tire Pressure Gauge: Buy a high-quality tire gauge with a long stem to reach the tire valves. Digital gauges have become popular due to their accuracy.
2. Remove or Loosen the Valve Cap: Some caps can be challenging to remove by hand, but be careful not to damage the threads.
3. Press the Gauge onto the Valve: Ensure a tight seal to get an accurate reading. Some modern vehicles have dual-wheel setups. Check the pressure of both tires.
4. Read the Gauge: If the gauge doesn't automatically display a reading, wait for it to stabilize and take a note.
5. Compare to Recommended Pressure: Check your vehicle's owner's manual or placard usually found in the driver's door jamb for the correct tire pressure. You may also find a range printed on the tire's sidewall.
6. Adjust if Needed: If the pressure is too high, slowly let air out by gently pressing on the valve stem. If it's too low, use an air compressor or gas station tire inflator to add air until you reach the recommended level.
7. Reinstall the Cap: Once you've achieved the desired pressure, firmly replace the valve cap to prevent air from escaping.
Tips:
- Check tire pressure regularly, especially before long trips, as under- or over-inflated tires can affect fuel efficiency, handling, and safety.
- Remember to check the pressure when tires are cool, which may mean waiting a few hours after a trip. Hot tires can provide false readings.
- When inspecting semi-trucks, there can be multiple axles with different tire sizes. Make sure to check the recommended pressure for each axle.
- If you're still not confident about checking tire pressure or notice unusual wear on your tires, consider having a professional mechanic inspect them.
