What does excessive inside edge wear on front tires usually indicate?

Excessive inside edge wear on front tires typically indicates that there is too much positive toe. When the front wheels are toed in excessively (or have too much positive toe), they point towards each other at the front relative to the rear of the vehicle. This misalignment can cause increased friction and wear on the inside edges of the tires, leading them to wear out faster compared to the outer edges.

When evaluating tire wear patterns, it is essential to consider how adjustments in toe settings alter the contact patch of the tire with the road. Too much positive toe places uneven loads on the tire, which directly contributes to the inside edge wearing quicker than the rest of the tire. In contrast, negative toe would lead to outer edge wear, insufficient camber adjustments relate more closely to overall tire wear patterns rather than a specific edge, and too much positive caster affects steering feel and stability rather than localized tire wear.