What Causes Tire Pressure Loss?
2 Answers
Tire pressure loss occurs when air leaks from the tire or when it is punctured by a nail, resulting in decreased tire pressure. Strictly speaking, tire pressure refers to the air pressure inside the tire. The standard tire pressure is 2.4-2.5 bar. In winter, it is advisable to slightly increase the tire pressure by about 0.2 bar above the standard, while in summer, it should be about 0.1 bar lower than the standard pressure. Here are some related details: Low tire pressure increases the friction coefficient with the road surface, leading to higher fuel consumption; it makes the steering wheel heavy and prone to deviation, which are factors detrimental to driving safety; it increases the movement of various parts of the tire, causing excessive rolling and abnormal heat generation. It may also reduce the functionality of the cords and rubber, leading to delamination or cord breakage, excessive friction with the rim, resulting in damage to the bead area and abnormal wear; the friction between the tire and the ground multiplies, causing a sharp rise in tire temperature, softening of the tire, and a rapid decrease in strength.
I've encountered tire pressure loss several times. The most common cause is nails or glass shards puncturing the tire on the road, leading to gradual air leakage or sudden pressure drops. Aging valve stems are also troublesome - rubber components crack over time, allowing air to slowly escape. If wheel rims rust or corrode, poor sealing can cause slow leaks too. Additionally, temperature fluctuations cause pressure variations (not actual leaks), with higher pressure in hot summers and lower readings in cold winters. I recommend a quick pre-drive tire pressure check using an inexpensive manual gauge, performing monthly tests to catch issues early. Underinflated tires cause steering pull and soft brakes - especially dangerous at highway speeds. If you notice abnormalities, immediately find a safe spot to address it. Small punctures can usually be repaired easily.
