What is the minimum tire pressure below which driving is not recommended?

[DelBrody]

Tire pressure below 1.7 bar is not recommended for driving. There is a standard tire pressure chart for your vehicle model near the fuel filler cap. Follow the tire pressure indicated on this chart to inflate your tires. If there is no chart near the fuel filler cap, check the door pillars on all four doors for the indicated tire pressure. It is normal for tire pressure to increase by 0.1 to 0.2 bar after the tires have warmed up. The specific tire pressure should be based on the manufacturer's recommended value. Strictly speaking, tire pressure refers to the air pressure inside the tire. Insufficient tire pressure will increase tire deformation, leading to cracks on the tire sidewalls and causing flexing movements, which results in excessive heat generation, accelerating rubber aging, fatigue of the cord layers, and breakage of the cords. It also increases the tire's contact area with the ground.

[VanBrielle]

I've been driving for ten years and encountered many tire pressure issues. Generally speaking, if it's below 1.5 bar (about 22 psi), you really shouldn't push it. Last week, my neighbor Old Zhang kept driving with tire pressure at 1.4, and the tire sidewall wore down to the cord layer, completely ruining the tire. Especially at high speeds, low tire pressure causes severe tire deformation, and the friction-generated heat can easily lead to a blowout. I always keep a portable air pump handy and top up the air whenever the pressure is 25% below the standard value. Remember, if the cold tire pressure is below 1.5, you should stop and deal with it immediately. Don't regret the towing fee—replacing a tire is much more expensive!

[Jonah]

Having worked in an auto repair shop for eight years, I've witnessed numerous accidents caused by insufficient tire pressure. When tire pressure drops below 1.6 bar (approximately 23 psi), the tire's contact patch increases by over 30%, leading to abnormal wear. Especially on hot summer road surfaces, continuing to drive below this value may cause internal steel belts to fracture. I recommend carrying a tire pressure gauge in your vehicle and becoming alert when pressure falls 20% below the standard value. For example, if a vehicle's standard pressure is 2.3 bar, don't drive when it's below 1.8 bar - at this point the tire sidewalls begin to deform, and continued driving may damage the rims.

[VanViolet]

I've been driving my new car for two years, and what I fear most is the tire pressure warning. Last time during a road trip, I noticed the tire pressure dropped to 1.7 bar, so I immediately got off the highway to find an auto repair shop. The mechanic said anything below 1.5 bar is dangerous, especially when cornering as it can easily lead to loss of control. Now I use digital tire pressure caps that turn yellow as a warning when pressure falls below 1.8 bar. From personal experience: for a car with standard tire pressure of 2.0 bar, it's best to stop when it drops to 1.6 bar. You need to be extra careful on highways - insufficient tire pressure significantly increases fuel consumption, adding about half a liter per 100 kilometers!

[Pluto]

As a mom, I pay special attention to driving safety and never compromise on tire pressure issues. When my child was three years old, I encountered a tire pressure alarm at 1.5 bar and immediately pulled over to call for roadside assistance. Now, I insist on using a mechanical tire pressure gauge for monthly checks and refill the tires whenever the pressure drops below 1.8 bar. Here’s a tip for everyone: when the pressure is below 1.6 bar (about 22 psi), the steering wheel will noticeably become heavier, and continuing to drive may damage the tire sidewalls. Especially in winter when temperatures are low, if the cold tire pressure in the morning is below 1.7 bar, don’t start the car—calling a tow truck is a safer option.

[LeHarmony]

Only by studying tire structure can one realize how damaging low-pressure driving is to vehicles. When tire pressure drops below 1.5 bar, the bending deformation of the tire exceeds its design limit, causing internal cord layers to break like repeatedly folded paper. I always keep emergency tire sealant in my car, but I never use it when pressure is below 1.5 bar (about 22 psi)—I call a tow truck instead. Tests show that for an SUV with a standard tire pressure of 2.2 bar, fuel consumption increases by 8% when pressure drops to 1.7 bar, and tire temperature rises by 15°C, which is particularly dangerous. It's advisable to install a tire pressure monitoring system to keep real-time data under control for safety.