What causes a rhythmic humming sound from the tires?
2 Answers
Tires producing a rhythmic humming sound are often due to abnormal tire pressure. Below is an introduction to tire pressure: Introduction: Tire pressure, strictly speaking, refers to the air pressure inside the tire. In terms of car maintenance, the engine is the heart of the car—its damage can lead to the end of the car's life. Similarly, tire pressure is the blood pressure of the car, as the level of tire pressure plays a crucial role in the car's performance and power. Methods of tire pressure monitoring: Direct tire pressure monitoring, indirect tire pressure monitoring, and the introduction of the Tire Pressure Monitoring System (TPMS). TPMS combines the advantages of the above two systems, equipping direct sensors in two diagonally opposite tires and incorporating a 4-wheel indirect system.
I've been driving for over twenty years, and this humming noise is most likely a tire issue. The most common cause is uneven tire wear leading to irregular rubber blocks, which creates a rhythmic noise when rotating, like a washboard. My old Jetta had the same problem last time—upon inspection, the inner side of the front tires was worn unevenly, a clear sign of misaligned wheels. Other possibilities include tire deformation, bulging, or bearing damage, where metal friction can also produce a humming sound. If the noise appears right after a highway drive, check the wheel hub temperature—if it's scalding hot, replace the tire immediately. This needs urgent attention; a blown tire is the least of your worries—losing traction on the highway is the real danger.
