A conveyor system comprising a series of rollers coupled to a side of a frame and configured to convey a plurality of conveyed articles thereacross along a direction of travel. Each of the rollers has a drive end. The series of rollers including a directly driven roller and a plurality of slave driven rollers disposed after the directly driven roller with respect to the direction of travel. The conveyor system includes a plurality of sheaves. Each of the sheaves is coupled to a drive end of one of the rollers. Each of the sheaves includes a plurality of V-shaped grooves formed in an outer surface thereof. The grooves are divided into an inner portion and an outer portion. An outer diameter of the inner portion of each of the sheaves is unequal to an outer diameter of the outer portion of each of the sheaves.