What Causes Wavy Tire Wear and Abnormal Noises?

[ArielRose]

Here are the reasons for abnormal tire noises: 1. Nails or debris puncturing the tire: The noise occurs once per tire rotation, resembling a "tap-tap" sound against the ground, with the rhythm accelerating as vehicle speed increases. If caused by stones, simply remove them; if caused by nails, you can drive directly to a repair shop for patching if the tire pressure remains stable in urban areas. 2. Worn brake pads: Front brake pads usually have electronic sensors, while rear brakes mostly rely on mechanical wear indicators. When brake discs become excessively thin, they produce a metallic "screeching" noise. The sound is faint when not braking but intensifies and becomes harsh when braking. In this case, drive cautiously to replace the brake pads immediately. Brake pad thickness can usually be checked through wheel rim gaps - replacement is mandatory when thickness measures less than 3mm. 3. Uneven tread wear: This manifests as a continuous "rumbling" noise, as if the tire is rolling over obstacles, often accompanied by steering wheel vibration and erratic left-right wobbling. Tire replacement is strongly recommended when these symptoms occur.