Set of 25580R/25520R Tapered Roller Bearings, 1-3/4" Inch Bore. Size: 1-3/4" ID x 3-17/64" OD x 15/16" Width. Single Row Tapered Wheel Bearings. SET52 NSK 25580R/25520R BEARING SET 25520 / 25580 25520/25580 Brand: NSK MADE IN JAPAN 25580R Additional Details Cone Bore (In): 1.750 Inch Cone Radius (In): 0.140 Inch Cone Bore (mm): 44.45mm Cone Length (mm): 25.4mm Cone Radius (mm): 3.556mm 25520R Additional Details Length (In): 0.750 Inch Length (mm): 19.05mm Outside Diameter (In): 3.265 Inch Outside Diameter (mm): 82.931mm Radius (In): 0.031 Inch Radius (mm): 0.787mm