What is the consequence of improper toe settings?

Improper toe settings can lead to uneven tire wear, which is the correct answer. When the toe alignment is not set correctly, it causes the tires to point inward or outward. This misalignment results in the tires scrubbing against the road surface at an angle rather than rolling smoothly. Over time, this can lead to excessive wear on one side of the tire more than the other, causing a condition known as "cupping" or "scalloping," which diminishes tire life and performance. Regular checks and adjustments of toe settings are essential to ensure even wear and extend the life of the tires, as well as maintain vehicle handling characteristics.

The other choices are associated with the benefits of proper alignment rather than the consequences of improper toe settings. Improved cornering stability, reduced fuel consumption, and enhanced suspension performance rely on correct alignment values, but they are not direct results of improper settings.