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What is the appropriate tire pressure for family sedans on highways?

1 Answers

VonAaliyah

07/25/25 4:29am

For family sedans running on highways, it is recommended to inflate the tires to around 250 or 260 Kpa. When driving at high speeds, if the tire pressure is too low, it can cause excessive compression and deformation of the tire carcass. As the speed increases, severe cases may even lead to standing wave phenomena in the tires, resulting in blowouts. Hazards of low tire pressure: Increased friction coefficient with the road surface, leading to higher fuel consumption; Heavier steering wheel and tendencies to veer, which are factors detrimental to driving safety; Increased movement of various parts of the tire, causing abnormal heat due to excessive rolling; Reduced functionality of the cords and rubber, leading to delamination or cord breakage, and excessive friction with the rim causing damage to the bead area and abnormal wear; Exponentially increased friction between the tire and the ground, causing a sharp rise in tire temperature, softening of the tire, and a drastic decrease in strength. High-speed driving under these conditions may lead to blowouts; Increased deformation of the tire body, making the sidewalls prone to cracking, along with flexing movements that cause excessive heat, accelerating rubber aging, fatigue of the cord layers, and cord breakage. It also increases the tire's contact area with the ground, accelerating wear on the tire shoulders.

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