What is the tire pressure for a 21-inch Cayenne?
2 Answers
According to the usage conditions and the manual, the tire pressure is generally around 2.5 mpa. Related introduction: 1. Introduction: Tire pressure, strictly speaking, refers to the air pressure inside the tire. There is a standard tire pressure indicator printed on the rear end of the driver's side door, which is the pressure when the tire is cold, i.e., after the vehicle has been parked for at least three hours or driven no more than 1.6 km. The tire pressure measured when the tire is cold is the most accurate. 2. Precautions: Too low tire pressure will increase the deformation of the tire body, and cracks are prone to appear on the tire side, while generating flexural movement, leading to excessive heat, promoting rubber aging, fatigue of the cord layer, and breakage of the cord. It will also increase the tire's contact area with the ground, accelerating wear on the tire shoulder. Too high tire pressure will cause excessive stretching deformation of the tire cord, reducing the elasticity of the tire body, increasing the load on the car during driving. If impacted, it may cause internal cracks and explosions. At the same time, excessive pressure will also accelerate wear on the tire crown and reduce its resistance to rolling.
I previously drove a Porsche Cayenne with 21-inch tires and found that the recommended tire pressure generally ranges between 34 to 38 psi, depending on the vehicle load. The front tires are usually set around 34 psi, while the rear tires are about 36 psi. The label on the driver's door frame provides detailed numbers, and it's recommended to measure the tire pressure with a gauge when the tires are cold, as measuring after driving can give inaccurate readings. If the pressure is too low, the ride becomes noticeably bumpy, tires wear out faster, and fuel consumption increases; if it's too high, comfort is reduced, and braking distance increases. I check it monthly, especially before long trips, to ensure safety. Once, I almost had a puncture due to low tire pressure but thankfully handled it in time. Remember, seasonal temperature changes also affect tire pressure readings—it's better to slightly increase the pressure in winter.
