Rigid Hitch Pair of 5-Bolt on 4-1/2 Inch Hub Assembly (AKSQ-2000545) Includes (2) Square Stock 1 Inch Straight Spindles & Bearings Pair of 1" straight spindles includes castle nuts and cotter pins. Bearings included - (4) L-44643 1" inside dimension. 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 (through center of hub) Spindles feature a SQUARE 1-1/2" stock diameter with a bearing surface of 1 Inch