What is the most common cause of excess tire wear on edges?

Excess tire wear on the edges is most commonly associated with underinflation. When tires are not properly inflated, the tire's profile changes, causing the edges to make more contact with the road. This increased contact leads to accelerated wear on the sidewalls, as the tire's overall footprint is not functioning optimally. Proper tire pressure is crucial not only for even tread wear but also for maintaining handling and fuel efficiency.

While misalignment can also contribute to uneven tire wear, it typically results in more wear on one side of the tire rather than around the entire edge, which is characteristic of underinflation. Worn suspension components can impact tire wear but are a less common direct cause compared to the effect of insufficient tire pressure. Overinflation leads to wear mainly in the center of the tread, not the edges. Therefore, understanding the relationship between tire inflation and edge wear helps in diagnosing tire-related issues effectively.