The term describes the accelerated degradation of a tire’s outer edge, significantly impacting vehicle handling, safety, and tire lifespan. This specific wear pattern manifests as a rounding off or feathering of the tire’s shoulder, reducing the contact patch with the road surface. The phenomenon is often more pronounced on the front tires due to the combined effects of steering and suspension geometry.
Understanding the origins of this wear pattern is critical for maintaining vehicle performance and preventing premature tire replacement. Addressing the underlying causes not only enhances safety but also contributes to improved fuel economy and reduced operational costs. Historically, diagnosing this issue required specialized tools and expertise, but modern alignment technologies and diagnostic procedures have made identification and correction more accessible.