Patent ID: 7419433

Claim:
An ATV drive shaft installed in an uneven terrain traversing, mounted type vehicle and adapted to transmit drive power to wheels through constant velocity joints on the inboard and outboard sides, the drive shaft comprising: a double offset type constant velocity joint used on the inboard side and an undercut free type constant velocity joint used on the outboard side; wherein said constant velocity joints each comprise: an outer joint member having a plurality of track grooves in an inner circumferential surface, an inner joint member having a plurality of track grooves in a spherical outer circumferential surface, torque transmitting balls disposed in a plurality of ball tracks formed by the opposing track grooves of both of said joint members, and a cage interposed between both of said joint members and holding said torque transmitting balls; and a track clearance of each of said constant velocity joints is in a range of 20 μm -200 μm, wherein said track clearance is defined by a difference between a pitch circle diameter (PCD) of the outer joint member and a pitch circle diameter (PCD) of the inner joint member.