YR-2-1/4-X Needle Roller Sealed Bearing 5/8" Bore Diameter One Bearing YR-2-1/4-X Needle Roller Sealed Bearing, Bearing Inner Diameter is 5/8" Inch, Bearing Outer Diameter is 2 1/4" Inch, and width is 1 1/4" Inch, it is used for heavier loads and where clevis or shaft mounting is preferred.