A seal has a casing having an outer-diameter surface, an interior facing surface, an exterior facing surface, and a chamfered surface between the exterior facing surface and the outer-diameter surface. A sleeve assembly is positioned radially inward from the casing, and has at least one dust lip that engages an interior side of the chamfered surface for blocking debris from the interior facing surface of the seal. A primary sealing body is positioned radially inward from the casing for blocking debris from the interior facing surface of the casing. The sleeve assembly rotates either with the casing or with respect to the casing.