What is the appropriate tire pressure for driving on highways in winter?
2 Answers
For driving on highways in winter, a tire pressure of 2.6 bar is appropriate. Strictly speaking, tire pressure refers to the air pressure inside the tire. The standard tire pressure for cars is 240-250 kPa, where 1 kPa equals 0.01 bar, according to the international GBT2978-2008 standard. The tire pressure for different types of tires is as follows: Standard tires: 2.4-2.5 bar; Reinforced tires: 2.8-2.9 bar; Maximum pressure: should not exceed 3.5 bar. Normal tire pressure in winter: In winter, the tire pressure should be based on the standard tire pressure of the car, with an appropriate increase of about 0.2 bar. Normal tire pressure in summer: Generally, the lower limit of the standard tire pressure for car tires is sufficient. For example, the lower limit for standard tires is 2.4 bar. If the car is often parked outdoors, the tire pressure can generally be about 0.1 bar lower than the standard to prevent tire blowouts due to high temperatures.
In winter, when driving on highways, tire pressure should be adjusted higher. With over ten years of driving experience, I’ve learned that tire pressure naturally drops in cold weather due to air compression. Typically, the recommended pressure on the vehicle’s door frame or manual is between 2.3 to 2.5 bar. On highways, extra caution is needed: tires heat up at high speeds, increasing pressure, so I usually add about 0.2 bar above the standard value—for example, if the standard is 2.4, I inflate to 2.6. This ensures better grip and stability, preventing blowouts or uneven wear. Also, check tire pressure before departure, preferably when the tires are cold, and don’t forget to measure during stops. Remember, high-speed driving carries risks, so safety first—I always keep a tire pressure gauge in the garage and check monthly. This keeps driving steady and improves fuel efficiency. Underinflated tires in cold weather are a common mistake that must be corrected.
