Wheelset bearing for a rail vehicle, and rail vehicle

A wheelset bearing, comprising:

• a rolling bearing assembly including first and second inner rings provided for connection to a shaft and one outer ring provided for connection to a support;
• first inner and first outer rolling element rows of rolling elements that contact the first inner ring to absorb axial forces in a first direction and second inner and second outer rolling element rows of rolling elements that contact the second inner ring to absorb forces in an opposite axial direction, the rolling bearing assembly is configured as a quadruple-row angular contact ball bearing in an O arrangement;
• and
• either the first and second inner rings or the outer ring for receiving each said rolling element row is/are formed with single-shoulder rolling element raceways, the single-shoulder rolling element raceways, viewed in cross-section along a central axis through the wheelset bearing, are each bounded by a radial line extending perpendicular to the central axis through a rolling element center of each rolling element of the respective rolling element rows, and the rolling element raceway extends from the radial line and from the rolling element center in a direction of a respective shoulder over an angle in a range from 35 to 75° to a reference point with a constant radius, and the respective rolling element raceway is formed from the reference point following a tangent applied to the rolling element raceway at the reference point.