Rigid Hitch Pair of 5-Bolt On 4-1/2 Inch Hub Assembly (AKRD-3500545) Includes (2) 1-3/8 Inch to 1-1/16 Inch Tapered Spindles & Bearings Pair of 1-3/8" to 1-1/16" tapered spindles. Bearings included - (2) L-68149 1-3/8" I.D & (2) L-44649 1-1/16" I.D Hubs have pre-installed pressed in races. Hub has a 5-bolt pattern on 4-1/2" bolt circle. Pilot diameter 2.59", flange diameter 6-1/2" and measures 4-1/4" tall (measured center of hub) Spindles feature a ROUND 1-3/4" stock diameter with a tapered spindle surface of 1-3/8" & 1-1/16"