What condition is indicated by tires worn on the outside edges with a feathered feel?

When tires show wear on the outside edges accompanied by a feathered feel, this condition typically results from excessive toe-in. Excessive toe-in causes the tires to point inward relative to the vehicle’s centerline. This misalignment leads to increased scrubbing of the outside edges of the tires. The "feathered" feel is a distinct characteristic of this type of wear, reflecting uneven tread contact as the tires roll.

The other options describe conditions that create different wear patterns. For instance, too much negative camber would cause the inside edges of the tires to wear more than the outside edges, while too much positive caster influences the steering stability rather than tire wear directly. Additionally, driving fast can lead to tire wear due to heat and other factors but isn't a specific alignment issue that would cause the described wear pattern. Therefore, the best explanation for the wear pattern in question is attributed to excessive toe-in.