Southwest Wheel 5-Hole, 4.5" Bolt Circle Idler Hub for 3,500 lb. Axles 5 studs 4.5" bolt circle (2 5/8" from center of one stud to the center of the next stud) Contains inner bearing, outer bearing, seal, grease cap and lug nuts. Fits a #84 Spindle using L68149 inner and L44649 outer bearing. Hubs are pre-raced &amp; pre-studded.