How to judge whether the tire is flat?

1, observe the tire circumference: pay attention to the tire circumference. If there is accumulation, it is lack of gas, and then touch it. Air cushions are much thinner than those without air. 2. Put the tire in water: Put the tire in water deep enough. If the water floats, it will seep from the tire weld, indicating that the tire is flat.

3. Squeeze the air by hand: the second finger bites the edge of the tire inflation port and rubs it with the other hand. If air is ejected immediately, it means that the tire is flat.

4. Use a barometer: A barometer can detect the tire pressure. If it is found to be lower than the required air pressure, it proves that the tire is flat, that is, deflated.

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