Abstract: A rolling bearing assembly particularly adapted for wheel bearings in vehicles comprising an inner ring having at least one radially outwardly directed mounting flange, an outer ring and a plurality of rolling elements in the annular space between the inner and outer rings, at least one cap member secured to the inner ring having an annular rim section directed towards the outer ring and a seal ring secured to the outer ring in sliding engagement with said cap member under the rim thereof, said rim portion incuding at least one lubricant collector chamber defined in part by a radially inwardly facing wall portion and including at least one relatively small opening in said wall portion communicating with said lubricant collector chamber.