Tapered Roller Bearing Cup, Bore Diameter Not Applicable, Compatible Cone Manufacturer Part Number 15578, 15579X, 15580, 15590, Cup Width 0.531 in, Lubricant Material Not Applicable, Outside Diameter 2 1/4 in, Overall Width 0.531 in, Ring Material Alloy Steel, System of Measurement Inch, Housing Fillet Radius 0.06 in