Glossary
Slow leak
A gradual loss of tire pressure that occurs over days or weeks rather than hours. Slow leaks are often undetected between inspections, allowing tires to run progressively lower until a pressure check or failure reveals the problem. Common causes include deteriorated valve cores, porous bead seals, micro-punctures, and innerliner damage.
Real-World Use
A trailer tire reads 10 PSI below target every Monday for three weeks despite being aired up each time — soapy-water testing reveals a valve core leak that was never investigated after the first low reading.
What to Pair It With
Read this term with the full tire sidewall, vehicle rating information, manufacturer documentation, and the actual condition of the tire.
This site is for general information only. It does not replace professional tire service, DOT compliance advice, tire manufacturer instructions, vehicle manufacturer recommendations, or fleet policy.