What is the unit of tire pressure for small cars?

1 Answers
VonEmily
07/29/25 3:35pm
Tire pressure is usually expressed in bar. Tire pressure can also be represented in kPa, where the normal range of 230-250 commonly refers to kPa. Strictly speaking, tire pressure refers to the air pressure inside the tire. Hazards of excessive tire pressure: Reduced tire friction and adhesion, affecting braking performance; causes steering wheel vibration and deviation, reducing driving comfort; accelerates uneven wear of the central tread pattern, shortening tire lifespan; increases vehicle vibration, indirectly affecting the longevity of other components. Decreased puncture resistance makes it easier for sharp objects like nails or glass to penetrate the tire, potentially causing internal cracks, blowouts, or tire bursts. Hazards of insufficient tire pressure: Increases friction with the road surface, leading to higher fuel consumption; results in heavy steering and deviation, compromising driving safety; excessive movement of tire parts causes abnormal heat buildup; weakens the function of cords and rubber, leading to delamination, cord breakage, or excessive friction with the rim, causing damage to the bead area and abnormal wear.
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