Of the types of rope listed, which one has wires preshaped to fit the twist in the strands?

The type of rope that has wires preshaped to fit the twist in the strands is preformed rope. This construction technique allows the wires to maintain their shape after being subjected to twisting, which enhances the rope's stability and performance under load.

Preformed rope is designed to have a consistent and uniform diameter, which contributes to smoother operation in sheaves and pulleys, reducing wear and tear on both the rope and the equipment it interacts with. This feature is particularly beneficial in applications such as elevators, where reliability and longevity of the rope are crucial.

While other types of ropes may have their specific characteristics, they do not possess the preshaped features that are integral to preformed rope. Economy ropes typically utilize a more basic fabrication process without such enhancements, standard twisted ropes have a more traditional construction that doesn’t maintain shape as effectively, and polyester ropes focus on material properties rather than the structural design of the wire itself. These factors make preformed ropes a preferred choice in many heavy-duty applications.