What is the normal tire pressure in bar?
3 Answers
Standard tires: 2.4-2.5bar; Reinforced tires: 2.8-2.9bar; Maximum pressure: should not exceed 3.5bar. Below is some information about tire pressure: 1. Under-inflation: Increases tire body deformation, prone to sidewall cracking, generates flexing motion leading to excessive heat buildup, accelerates rubber aging, causes fatigue in the cord ply and cord breakage, while also increasing the tire's contact area and accelerating shoulder wear. 2. Over-inflation: Causes excessive stretching deformation of tire cords, reduces tire elasticity, increases vehicle load during driving, may lead to internal cracking and blowouts upon impact, while also accelerating tread wear and reducing puncture resistance.
I've been driving for many years and have quite some experience with tire pressure. For normal passenger cars, the tire pressure is usually between 2.2 to 2.5 bar, but it varies for each vehicle, so you should check the owner's manual or the label on the door frame. When the pressure is too low, the tires can flatten, increasing fuel consumption and making them prone to wear or even blowouts; if it's too high, the ride becomes stiff, reducing comfort and safety due to poor shock absorption. I check mine every two months using a simple tire pressure gauge that costs around ten bucks, measuring when the tires are cold (several hours after parking) for more accurate readings. Remember that tire pressure changes with temperature—it can drop by about 0.2 bar in cold weather, so add a bit more when inflating. Maintaining around 2.4 bar is safe, improves fuel efficiency, and extends tire life. If the pressure is low before a highway trip, head to a gas station to top it up immediately.
As a working car owner, I always pay attention to tire pressure safety. The normal tire pressure for sedans is around 2.3 bar, while SUVs can go up to 2.5 bar. If the pressure deviates from the normal range, such as falling below 2.0 bar, the tire's friction with the ground increases, fuel consumption rises by more than 10%, and there's a risk of losing control at high speeds. On the other hand, if the pressure exceeds 2.6 bar, the grip weakens and the tires are more prone to slipping. I check the tire pressure every time I refuel using the air pump tools at gas stations. The recommended values are listed in the manual, and measuring cold tires is the most reliable. Additionally, tire pressure is related to weight. When the car is fully loaded with passengers or cargo, it's advisable to increase the pressure slightly, say by 0.2 bar, to prevent sudden blowouts. Developing this habit is simple and provides peace of mind.
