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What is the tire pressure for a spare tire?

1 Answers

LeAliyah

07/30/25 12:21am

The air pressure of the spare tire should be between 2.3bar and 2.5bar. During driving, if the tire pressure is too high or too low, or if encountering sharp objects, the car tire may experience a blowout. Hazards of low tire pressure: Increased friction coefficient with the road surface, leading to higher fuel consumption; Causes the steering wheel to become heavy and prone to deviation, which are factors detrimental to driving safety; Increases the movement of 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, sharply raising the tire temperature, softening the tire, and drastically reducing its strength. High-speed driving may result in a blowout; Increases tire body deformation, making the tire side prone to cracks, while generating flexing motion, leading to excessive heat, accelerating rubber aging, cord fatigue, and breakage, and enlarging the tire's contact area with the ground, accelerating shoulder wear. Hazards of high tire pressure: Reduces the tire's friction and adhesion, affecting braking performance; Causes steering wheel vibration and deviation, reducing driving comfort; Accelerates wear on the central tread pattern of the tire, shortening its lifespan; Increases vehicle body vibration, indirectly affecting the lifespan of other components; Overextends the tire cords, reducing the tire body's elasticity and increasing the load on the car during driving; Decreases puncture resistance. When encountering sharp objects like nails or glass on the road, they can easily penetrate the tire, causing internal cracks and blowouts due to impact.

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