What Are the Reasons for the Decrease in Tire Pressure of New Cars?
3 Answers
Reasons for the decrease in tire pressure of new cars: 1. The car has been parked for too long, causing the tire pressure to drop. When the car leaves the factory, the tire pressure is actually closer to the upper limit of the safe range, but as the car remains parked for an extended period, the tire pressure will change; 2. Some manufacturers intentionally lower the tire pressure to prevent excessively high speeds. Since it's a new car, even experienced drivers need an adaptation period. During this period, to prevent traffic hazards due to high speeds, the tire pressure is slightly reduced; 3. Tire damage. If there is an issue with the tire when leaving the factory or if the tire is punctured during use, when the low tire pressure alarm for the new car's tire is triggered, it is essential to carefully check whether the tire is damaged.
I just bought a new car, and after driving it for half a month, I noticed the tire pressure is dropping, which really makes me a bit nervous. There are many reasons for new car tire pressure loss: First, the factory might not have inflated it to the standard pressure, and some cars experience tire pressure changes during transportation. Second, significant temperature fluctuations—expansion in hot weather and contraction in cold—especially when temperatures drop suddenly, can cause noticeable pressure loss. Additionally, the tire valve core might not be tightened properly or could have minor damage, such as running over sharp objects while parking, leading to slow leaks. New car tires are made of fresh materials, and their airtightness might not yet be ideal. I’ve learned that I should buy a portable tire pressure gauge and check it weekly to keep it within the recommended range. Insufficient tire pressure not only affects driving comfort but also increases tire wear and fuel consumption, which is bad for both safety and your wallet in the long run. Never overlook these details—safe travel is the most important thing.
After years of driving, I've seen many cases of unstable tire pressure in new cars. There are usually three main factors for pressure drop: First, the factory-set tire pressure may not be precisely calibrated during production, and prolonged storage can cause slow leaks in inventory vehicles. Second, weather factors - cold air entering the tires compresses, naturally reducing pressure, where the principle of thermal expansion and contraction is clearly at play. Third, structural issues with the tires, such as aging valve cores or small holes; occasionally new cars may have improperly cured sealant. I recommend using a pressure gauge to check yourself rather than just waiting for the warning light. Low-pressure tires wear out faster, increase contact area, raise friction leading to higher fuel consumption, and can easily cause sidewall cracks. Regular checks can extend tire life, saving fuel and improving safety. Every driver should develop this habit.
