Product Specs:
AIR Rotax Clutch Drum Needle Roller Bearings
Available Options: New Style 17mm for use with O-Ring or Old Style 20mm wide for use without the O-Ring
Please note the O-ring is not included
Will work on all 12T and larger Rotax engine sprockets
Use the 17mm Wide Bearing for 12 Tooth and Up sprockets when the clutch o-ring is being used
Use the 20mm Wide Bearing for 12 Tooth and Up sprockets when NO clutch o-ring is being used