Abstract: Replaceable pulley lagging--for an initially smooth-faced, endless conveyor or elevator belt drive pulley--comprising a multiplicity of relatively narrow, transversely extending traction pads pre-formed to mate with the arcuate pulley face, and applied edge to edge in a circumferential array and number to substantially fully embrace the face of the pulley; the traction pads being secured to the face of the pulley in detachable relation whereby to permit removal and replacement of said pads when worn or damaged.