This Cannondale headset is specifically for the Moto frames, however includes 2x 52mm x 8mm x 36deg bearings, and hence can be used in other frames that use 1.5 top and bottom. Or, purchase the headset for the quality bearings alone. 

• Kit includes ALL items as pictured
• Suitable for straight 1.5" forks (not Lefty or Headshok)
• Cannondale Part # KP081