If the extended longitudinal axis of the main landing gear wheel assemblies intersects aft of the aircraft, how are the wheels described?

When the extended longitudinal axis of the main landing gear wheel assemblies intersects aft of the aircraft, the wheels are described as "toe-in." This condition occurs when the front of the wheels points slightly inward relative to the centerline of the aircraft.

Toe-in can be advantageous for directional stability during takeoff and landing. Having the wheels angled this way can help maintain better contact with the runway surface and improve handling characteristics, especially on uneven ground. It ensures that the wheels are positioned to follow the aircraft's intended trajectory more effectively, helping to facilitate a straighter path during operation and reducing the tendency for the aircraft to wander off course while on the ground.

In contrast, other alignment options like toe-out would mean the wheels are angled outward, which can lead to instability. Neutral alignment indicates that the wheels are parallel to the centerline, while cambered alignment refers to the vertical tilt of the wheels. Each of these conditions has distinct effects on the aircraft's handling and stability, but in the case of the described scenario, toe-in is clearly the correct characterization.