When the Roewe rx3 user manual indicates the standard thermal state of tire pressure, the normal tire pressure of the front wheel should be 0.2 1 MPa, and the spare tire should be 0.42Mpa because it is not common. Generally speaking, the tire pressure information will be printed on the side of the car side door. Car buyers should check whether the tire pressure is appropriate according to the tire pressure information.

Tire pressure is the pressure of tire gas, which has a very important influence on the performance driving force of the car.

Too high or too low tire pressure will shorten the service life of tires. If the tire pressure is too low, the tire shape will expand and the sidewall will crack easily. At the same time, it will cause buckling and fitness exercise, cause excessive combustion, promote the embrittlement of vulcanized rubber, fatigue of tire cord layer and fracture of steel cord, expand the total area of tire grounding device and accelerate the damage of tire shoulder. If the tire pressure is too high, the tire steel cord will be subjected to excessive tensile deformation, the tire ductility will be reduced, and the load on the car will be increased. Internal cracks and engineering blasting will be formed in case of impact. At the same time, if the standard air pressure is too high, it will accelerate the tire crown damage and reduce the rolling resistance.

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