Quartermaster Race Hydraulic Release BearingQuarter Master Hydraulic Floating Throwout Bearings have been the standard in short track racing for years. Each of these release bearings features a radius faced bearing with a reduced contact radius for ease of clutch pedal and return spring. This minimizes continuous contact of the bearing and clutch spring fingers. They are universally adaptable. For 7. 25'' clutch assembly Radius face 52mm bearing