Why Does Tire Pressure Decrease?

1 Answers
LaJulia
07/29/25 11:22pm
Tire pressure may decrease due to the following 5 reasons: 1. Punctured tire: Generally, if the puncture hole diameter is less than 6mm and not located on the tire sidewall, it can be repaired. The most effective repair method is using a mushroom plug. If the puncture exceeds 6mm in diameter, tire replacement is necessary. 2. Slow air leakage: Natural tire aging or prolonged vehicle parking may cause gradual air loss. Inflate to normal pressure range or replace the tire. 3. False alarm from TPMS: Measure actual tire pressure with a gauge when tires are cold. If the measured pressure is within normal range, it indicates a TPMS false alarm. 4. Vehicle consistently carrying overweight loads, causing uneven tire stress. 5. Normal pressure reduction due to thermal contraction (temperature changes).
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