To measure the **tire pressure** of a vehicle, a **pressure gauge** is used. This device is essential to ensure that the tires are properly inflated, which is crucial for the safety and performance of the vehicle.

- **Correct inflation pressure:** Tires must have the right amount of air to support the weight of the vehicle and ensure good contact with the road. This helps prevent issues such as uneven tire wear, increased fuel consumption, and vehicle instability.

- **Consequences of incorrect pressure:**
- **Low pressure:** Can cause the tire to heat up, deform, and wear out faster. It also increases the risk of blowouts and reduces vehicle stability, especially on wet surfaces.
- **High pressure:** Reduces the tire's contact with the ground, which decreases grip and causes uneven wear. Additionally, the vehicle may vibrate more because the tires do not absorb road irregularities well.

- **Regular check:** It is important to check tire pressure at least once a month and before long trips. This is done using a pressure gauge to ensure the pressure is as recommended by the vehicle manufacturer.

In summary, the **pressure gauge** is the appropriate tool to measure tire pressure and ensure they are in optimal condition for safe driving.