Dimensions: Rear Wheel Ball Bearing: Outer Diameter: 1.57 - 40 mm, Inner Diameter: 0.47 - 12 mm, Width: 0.47 - 12 mm, Dual Sided Rubber Sealed: Width: 14 mm - 0.55 in, Inner Diamter: 18 mm - 0.7 in, Outer Diameter: 47 mm - 1.85 in, O-Ring: Length: 57 mm, Width: 63.5 mm, Height: 3.25 mm
We strongly suggest comparing the posted picture to the unit(s) that needs to be replaced.