Is a tire pressure of 2.7 normal on the highway?

[VonCecilia]

When driving on the highway, the tires will heat up, and due to thermal expansion and contraction, fluctuations in tire pressure are normal. A tire pressure of 2.7 on the highway is also normal, but it is necessary to adjust the driving speed of the car. Reference standards for normal tire pressure: According to the provisions and requirements of the international GBT2978-2008 standard, the standard tire pressure is around 2.4-2.5bar for standard tires, and around 2.8-2.9bar for reinforced tires. On roads with significant bumps, it is appropriate to reduce the tire pressure by 0.1-0.2bar based on the standard tire pressure of the car tires. For long-distance highway driving, the tire pressure should not be too low; it is appropriate to increase the tire pressure by about 0.2bar based on the lower limit of the standard tire pressure. Effects of excessive tire pressure: Increases the friction of the tires, reduces adhesion, and affects braking performance; causes steering wheel vibration and deviation, reducing driving comfort; accelerates localized wear of the tread pattern in the center of the tire, shortening the tire's lifespan; increases body vibration, indirectly affecting the lifespan of other components.