A hub seal for installation on the wheel end of a heavy duty trailer or truck is disclosed which includes an annular casing, an elastomeric sealing ring supported within the annular casing and including an axially extending sealing lip, an annular sleeve mounted coaxial with the annular casing, the annular sleeve having an axially extending sealing surface, and a spring for biasing the axially extending sealing lip against the axially extending sealing surface such that a substantial portion of the sealing lip is in sealing engagement with the sealing surface over a substantial contact area.
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