What Causes Tire Pressure to Drop in Rainy Weather?

[AlinaAnn]

Tire pressure drops in rainy weather because rain or pre-rain conditions introduce more water vapor into the air, reducing the average molecular weight of the air, which in turn decreases air density and leads to lower pressure. Hazards of Low Tire Pressure: Increased friction coefficient with the road surface, leading to higher fuel consumption; Causes the steering wheel to feel heavy and may lead to veering, both of which are detrimental to driving safety; Increases movement in various parts of the tire, causing abnormal heating due to excessive rolling; Reduces the functionality of the cord and rubber, leading to delamination or cord breakage, and excessive friction with the rim causing damage and abnormal wear at the bead area; Multiplies the friction between the tire and the ground, rapidly increasing tire temperature, softening the tire, and drastically reducing its strength. High-speed driving under these conditions may result in a blowout; Increases tire body deformation, making the tire sidewalls prone to cracking while generating flexing movements that cause excessive heat, accelerating rubber aging, fatigue in the cord fabric layer, and cord breakage. It also enlarges the tire's contact area with the ground, speeding up wear at the tire shoulders.