Patent ID: 7246946

Claim:
A rolling bearing unit for wheel support comprising a stationary race, a rotating race, a plurality of rolling bodies and a pair of seal rings, the stationary race being adapted to be supported by and fastened to a suspension device when in use, the rotating race being adapted to support and fasten to a road wheel when in use, the rolling bodies being located between stationary raceways and the surface of rotating raceways that are formed on facing peripheral surfaces of the stationary race and rotating race, respectively, wherein the pair of seal rings seal off openings on both ends of a space between the opposing peripheral surfaces of the stationary race and rotating race where the rolling bodies are located, both seal rings having at least two seal lips made of an elastic material, wherein the rotation resistance of both seal rings due to the friction between the seal lips and the opposing surface is a total of from 0.06 N·m to 0.4 N·m.