What is a common sign of tire trouble while driving at high speeds?

Unusual vibrations or noises are a common sign of tire trouble while driving at high speeds because they indicate that something may be wrong with the tires' balance, alignment, or overall condition. When tires are not functioning properly, they can generate additional vibrations or make loud noises due to uneven wear, misalignment, or an internal defect. These signs are crucial because they can alert drivers to potential issues before they become more serious problems, such as blowouts or loss of control of the vehicle.

Maintaining proper tire condition is essential for safety, especially at high speeds, where even minor defects can lead to significant hazards. The other choices do not accurately reflect signs of tire issues; for example, increased fuel efficiency may result from good tire condition, but it's not a symptom of a problem. Enhanced steering response suggests that the tires are functioning well, and less need for maintenance does not relate to indications of tire trouble.