What are the symptoms of deformed car tires?

[OFernando]

Feel the tread surface of the tire with your hand to check for unevenness. Generally, deformed tires will produce increased noise when driving, and in severe cases, the car may shake. You can also detect this by using a tire balancer or lifting the car and rotating the wheel by hand. The following five situations require tire replacement: 1. Tires must be stopped when worn to the wear limit indicator (i.e., tread depth below 1.6 mm). 2. Aged tires. 3. Tires with deformed treads or damaged beads, tires damaged by driving underinflated (resulting in sidewall damage), and tires corroded by chemicals must not be used further. 4. Bulging tires must not be used further. 5. Any other damage that affects tire safety must also result in discontinuation of use.

[DeHenry]

After years of driving, what I fear most is tire deformation, with symptoms being particularly obvious. When the speed increases, the steering wheel starts shaking violently, making the whole car feel like it's wobbling, especially scary when overtaking on the highway. After stopping, a close look at the tire reveals uneven surfaces, as if someone pinched several dents into it. On rough roads, the wheels make strange thumping noises, as if something is stuck in the tire rotation. If the deformation is severe, the car starts pulling to one side while driving, requiring a strong pull on the steering wheel to correct. These conditions are all caused by broken steel belts inside the tire, commonly seen in cars that frequently hit curbs or have consistently low tire pressure. Now, at the first sign of these symptoms, I immediately head to the tire shop—safety always comes first.

[SaraLynn]

Last time I came back from a business trip, I noticed something wrong with my car. At low speeds it was fine, but once I hit 60 mph, the rear end started bouncing up and down like sitting on a massage chair. When I got out to check the tires, I found a bulge that felt hard to the touch. The most annoying part was when going over speed bumps - that deformed wheel always made a dull clunking sound. The mechanic said it got deformed from being parked too long, and there were even cracks on the tire sidewall. He advised me not to exceed 80 mph, plus the tire noise was especially loud with this wobbly vibration sound. Now I've developed the habit of walking around the car to check the tires before every start. If I find any deformation, I replace it immediately - a high-speed blowout would be too dangerous.

[OGraham]

As a novice, I didn't understand tire maintenance and ended up suffering the consequences. While driving, I always felt the wheels bouncing, especially noticeable with the left front wheel when going over manhole covers. The steering wheel seemed to have a recoil force, and during turns, the tire sides would squeak from friction. Later, I discovered wave-like wear patterns on the tire contact surfaces, and the car kept pulling to the right. The mechanic explained that this was due to uneven tire contact surfaces caused by deformation, recommending that I check tire pressure at least once a month. Insufficient tire pressure in summer is most likely to cause deformation, so now I always use a tire pressure monitor.

[MacAva]

After three years of driving for ride-hailing, I've seen too many cases of tire deformation. The most typical symptom is the car pulling to one side, requiring constant steering correction even on straight roads. Passengers often complain about excessive bumpiness in the back seat, which is actually caused by body resonance from deformed tires. The steering wheel vibrates intermittently at certain speeds, most noticeably around 70 km/h. A tire shop worker taught me a trick: lift the car and spin the tires - deformed ones will show visible up-and-down movement. Now I get wheel balancing every 5,000 kilometers. After all, driving daily means tire condition directly relates to life safety.

[StDelaney]

After the last road trip, I noticed the left rear wheel was deformed, with very typical symptoms. Daily driving wasn't a big issue, but when hitting speeds over 100 km/h on the highway, the entire car body would shake. During deceleration, the brake pedal would pulsate with a noticeable 'click-click' impact. Upon inspecting the tire's contact surface, I found it had worn into a jagged edge. The mechanic said long-term overloading or abnormal tire pressure are the most damaging to tires and recommended regular cross-rotation. Deformed tires are particularly fuel-inefficient; during that period, fuel consumption increased by half a liter. Now I've learned my lesson—I park away from direct sunlight, as prolonged sun exposure is most harmful to tire structure.