UC209 45mm Axle Bearing Insert Mounted BearingsUC209 Mounted Bearings 45mm x 85mm x 49. 2mm 45mm mounted Bearing UC209, the inner diameter is 45mm, the outer diameter is 85mm, the inner ring width is 49. 2mm and the outer ring width is 22mm, this is a popular size that could be used in many applications. Item: UC209 Bearing Type: Mounted Bearing Bearing Size: 45mm x 85mm x 22mm 49. 2mm Inner Diameter: 45mm Outer Diameter: 85mm Inner Ring Width: 49. 2mm Outer Ring Width: 22mm Dynamic load rating