The first most economical method is of course to observe the flatness of tires with naked eyes, which is certainly not the most accurate method. It is also to test the driver's familiarity with the vehicle. It is recommended that old drivers use this method.

The second is to buy a high-precision pointer display tire pressure gauge, and the tire pressure detection instrument should detect the tire pressure at each tire joint. Of course, this method is more troublesome.

The installation method of external tire pressure body is also very simple, including solar display screen and wiring display screen. The solar display screen can be directly placed in a corner of the vehicle dashboard that does not block the line of sight. The sensor is directly screwed on the valve core.