Pack of 2 Spindle Pulleys Compatible with OEM Parts 153535 173436 129861 177865 5/8" ID x 5-3/16" OD x 7/8" Height (Thick) Pack of 2 Spindle Pulley Compatible with 153535 173436 129861 177865. Dimensions: 5/8" ID x 5-3/16" OD x 7/8" Height (Thick). Fits 42 inch decks and some 44 and 50' decks. Important: the spacer (existing in your pulley) must be kept under the pulley, never between the pulley and the locknut.