A vehicle wheel bearing apparatus has an outer member with a body flange
and double row outer raceway surfaces. An inner member includes a wheel
hub and an inner ring. They include inner raceway surfaces arranged
opposite to the double row outer raceway surfaces. Double row rolling
elements are freely rollably contained between the outer and inner
raceway surfaces. Outer side rolling elements of the double row rolling
elements are balls and inner side rolling elements of the double row
rolling elements are tapered rollers. A pitch circle diameter of the
inner side tapered rollers is set smaller than that of the outer side
balls. A substantially conical recess is formed at an outer side end
portion of the wheel hub. The depth of the recess extends to at least
near the bottom of the inner raceway surface of the wheel hub. The
thickness of a portion of the wheel hub where the inner raceway surface
is formed is set within a predetermined range. The outer side wall of the
wheel hub has a constant thickness substantially along the inner surface
of the recess.