Abstract: The invention provides modular drive and deflector sheave assemblies for raising and lowering elevator cars and for deflecting a support rope or cable in different directions with minimal wear. The drive sheave assemblies of the invention provide sufficient traction between a support rope, e.g., nylon-jacketed Kevlar suspension rope, and sheave to raise and lower elevator cars without requiring more than 180° of contact between the rope and drive sheave. Such a drive sheave assembly can advantageously have a non-rope-pinching groove, thereby minimizing wear on the rope and vibration during operation.