Bearing device for vehicle wheel

A bearing device for a vehicle wheel, the bearing device comprising:

• an outer member which has a plurality of rows of outer raceway surfaces provided on an inner periphery;
• an inner member which includes a hub ring and at least one inner ring, the hub ring having a small-diameter step portion that is provided on an outer periphery and extends axially and a vehicle wheel mounting flange that is disposed on an outer side with respect to the small-diameter step portion, the at least one inner ring being press-fitted to the small-diameter step portion of the hub ring, and the inner member having a plurality of rows of inner raceway surfaces that are provided on an outer periphery and face the plurality of rows of outer raceway surfaces;
• a plurality of rows of rolling elements that are rollably accommodated between the inner raceway surfaces of the inner member and the outer raceway surfaces of the outer member;
• an outer-side seal member that closes an outer-side opening end of an annular space formed by the outer member and the inner member, the outer-side seal member including a core metal which is fitted to the outer member, a seal member which is joined to the core metal, and a metal ring which is fitted to the hub ring of the inner member and with which the seal member is in sliding contact;
• and
• a rubber member that is provided radially outside the metal ring and is in contact with the vehicle wheel mounting flange of the hub ring,
• wherein an annular space is provided between a radially inside end portion of the rubber member, the metal ring and the hub ring, and the annular space is filled with a filler.