What is the appropriate standard tire pressure for car tires?
3 Answers
The standard tire pressure for car tires is appropriate between 2.3 to 2.5 bar. The hazards of excessive tire pressure include: 1. Reducing the friction and adhesion of the tire, affecting braking performance and tire lifespan; 2. Decreasing the tire's resistance to punctures, increasing the risk of blowouts; 3. Accelerating wear on the central tread pattern of the tire, reducing tire lifespan, increasing vehicle vibration, and affecting the lifespan of other components; 4. Causing excessive stretching and deformation of the tire cords, reducing the elasticity of the tire body, increasing the load on the vehicle during driving, and decreasing puncture resistance; 5. Making it easier for sharp objects like nails and glass on the road to penetrate the tire, leading to internal cracks and blowouts upon impact, resulting in tire blowouts.
Back when I was an apprentice at the repair shop, my mentor always said the most reliable method is to check the left front door frame or fuel tank cap, where the original manufacturer's recommended tire pressure values are posted. For regular sedans, it's usually around 2.3-2.5 bar, while SUVs tend to be slightly higher at around 2.6 bar. Last month, my neighbor inflated their Tiguan's tires to 3.0 bar, and the ride over speed bumps was so bumpy it made the kids cry. Nowadays, I always measure tire pressure when the car is cold, meaning after it's been parked overnight and before driving in the morning. If you've just come off the highway, you should wait about half an hour for accurate readings. By the way, tire pressure monitors are now available for just over a hundred bucks, which is much more cost-effective than frequent trips to the auto repair shop.
Actual tire pressure should be checked against the specific vehicle's manual. For ordinary sedans, the most common tire pressure is 2.2-2.3 bar for the front wheels and 2.2 bar for the rear wheels when unloaded, but electric cars like the Model 3 require 2.9 bar. Seasonal changes have a significant impact; tire pressure naturally increases by 0.3 bar in summer and can drop by 0.5 bar in winter. Once, I drove on the highway with a tire pressure of 2.0 bar, and my fuel consumption increased by 1 liter. Friends who install wider tires should remember to add 0.2 bar to the manufacturer's recommended pressure, and those with an aspect ratio below 45 should add even more. Choose a digital tire pressure gauge, as analog ones are prone to misreading.
