What can cause excessive tire wear on the inner edges?

Excessive tire wear on the inner edges is primarily a result of too much negative camber. Negative camber refers to the situation where the top of the tire leans inward toward the vehicle, which can improve cornering performance. However, if the negative camber is excessive, it places more load on the inner edge of the tire during driving, especially in turns. This uneven distribution of weight leads to increased wear on the inner edge compared to the outer edge. As a result, tires with too much negative camber will show significant wear patterns that reflect this alignment issue.

The other options, while they can also affect tire wear, typically don't lead to the specific inner edge wear that excessive negative camber does. Positive camber, for instance, could lead to wear on the outer edges, and improper toe settings can create uneven tire wear but not specifically concentrated on the inner edges like negative camber can. Worn-out tire tread affects overall grip and safety but does not cause the distinct inner edge wear pattern related to camber adjustments. Understanding the effects of alignment settings on tire wear is crucial for vehicle maintenance and tire longevity.