| 摘要 |
A driving wheel bearing device has an outer member on an inner peripheral surface forming double row raceways, an inner member on an outer peripheral surface of which raceways opposing to raceways of the outer member and a wheel mounting flange are formed, double row rolling elements between each raceway of the outer and inner members, and a constant velocity universal joint having a joint outer ring of which a shaft portion is inserted into the inner member such that torque is transmittable, the bearing device rotatably supporting a wheel on an automobile body, wherein a pilot portion is provided between a base part of the shaft portion of the joint outer ring and an end portion of the inner member.
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