Posted on 8/28/2026
A tire can lose air even when no nail, screw, or obvious puncture is visible. Air can escape through the valve stem, around the wheel bead, through corrosion on the rim, from a cracked wheel, or through damage that is too small to see without testing. Temperature changes can also lower the pressure in all four tires, but repeated loss from the same tire points toward a leak. The correct repair starts by locating exactly where the air is escaping instead of adding air every few days and hoping the problem remains minor. A Leaking Valve Stem The valve stem is the small fitting used to inflate the tire. Rubber valve stems can crack near the base, harden with age, or become damaged when an air hose is pulled sideways. Metal valve stems can leak around their seals, retaining nuts, or tire pressure monitoring sensor components. The valve core inside the stem can also loosen or fail to seal. A leaking core may release air slowly enough that the tire takes several days or ... read more