What is the likely outcome of improper toe settings?

Improper toe settings can lead to uneven tire wear, which is the primary reason why maintaining correct alignment is crucial. Toe alignment refers to the angle at which the tires point relative to the centerline of the vehicle. When the toe settings are not within specifications, it can cause the tires to scrub against the road instead of rolling freely. This scrubbing effect results in excessive wear on the tire edges, leading to a shorter lifespan for the tires and potentially affecting vehicle handling and safety.

The other options do not accurately reflect the impact of improper toe settings. There is no scenario where incorrect toe would result in no impact on driving; in fact, it often compromises vehicle stability and control. Additionally, incorrect toe settings are unlikely to improve fuel efficiency, as they can create more resistance and drag, leading to increased fuel consumption. Finally, while improper toe settings do not directly affect engine performance, they can contribute to overall vehicle inefficiency, which may indirectly influence fuel usage and driveability. Therefore, the outcome of uneven tire wear is the most relevant consequence of improper toe settings.