Rear Wheel Hub Triumph all Rigid Models 1937-1954 incl. 3T, 3S, 5H, 5S, 6S, TRW, 3HW, 3T, 5T, and 650cc T110 and 1954 onlyno grease nippleOriginal Part number bearing W7A Timken Type bearing OD 1 3/4" ID 9/16This hub fits the axle W61see meas. last picture - please view ALL Pictures.ID 1 3/4" ca. 44,4 mm