Wheel bearing device

A wheel bearing device comprising:

• an inner member including double row inner raceway surfaces and including a wheel mounting flange in a first axial direction of the double row inner raceway surfaces;
• an outer member including double row outer raceway surfaces facing the double row inner raceway surfaces;
• a plurality of first balls interposed between a first inner raceway surface located in the first axial direction out of the double row inner raceway surfaces and a first outer raceway surface located in the first axial direction out of the double row outer raceway surfaces;
• and
• a plurality of second balls interposed between a second inner raceway surface located in a second axial direction opposite the first axial direction out of the double row inner raceway surfaces and a second outer raceway surface located in the second axial direction out of the double row outer raceway surfaces, wherein
• the plurality of first balls and the plurality of second balls have a same diameter,
• a contact angle of the plurality of first balls is smaller than a contact angle of the plurality of second balls,
• an axial position of a point of intersection between a first line of action of a load that is applied to the plurality of first balls and a second line of action of a load that is applied to the plurality of second balls is located in the first axial direction with respect to an axial midpoint between an axial position of a bottom of the first outer raceway surface and an axial position of a bottom of the second outer raceway surface,
• the outer member includes, on an outer periphery of the outer member, a vehicle body mounting flange that is for the outer member to be mounted on a vehicle body,
• an axial position of an axial middle of the vehicle body mounting flange is located in the first axial direction with respect to the axial midpoint between the axial position of the bottom of the first outer raceway surface and the axial position of the bottom of the second outer raceway surface, and
• the axial position of the point of intersection is located in the first axial direction with respect to the axial position of the axial middle of the vehicle body mounting flange.