What Causes Gradual Tire Pressure Loss?
2 Answers
Tire pressure may gradually decrease due to various reasons including punctures, improper repairs, aging of the valve rubber, or failure to reset the valve core after pressure checks. Below is relevant information about tire pressure: 1. Normal tire pressure loss is approximately 0.07 bar/month, so it's recommended to check tire pressure at least once a month. 2. The recommended tire pressure should follow the vehicle manufacturer's specifications. These values can typically be found in the vehicle's user manual, on a label near the driver's door (B-pillar), inside the driver's side drawer, or on the fuel tank cap. 3. Unless otherwise specified, no special adjustments are needed for winter or summer seasons. It's advisable to measure tire pressure under normal temperature conditions.
I've been in the auto repair business for years and have seen many cases of gradually decreasing tire pressure. The most common issue is slow leaks caused by punctures from nails or other sharp objects—you should listen for hissing sounds or spray soapy water to check for bubbles. It could also be due to aging valve stems with poor sealing, or rusted/warped rims affecting the seal. Tire pressure naturally drops in cold weather, so frequent checks are essential during autumn and winter. I recommend investing in a good tire pressure gauge and checking weekly without delay. Low tire pressure not only wastes fuel but also accelerates tire wear, and poses serious risks like blowouts at high speeds—prompt action ensures safety and peace of mind.
