Chris King DropSet 2 Headset.

• Patented GripLock retention design for exclusively reliable headset adjustment
• 42mm 45x45 upper bearing
• 52mm 45x45 lower bearing
• Compatible with King baseplate and 45 degree integrated crown races

Specifications:

• Defined Color: Black
• S.H.I.S. Stem Clamp Diameter: 28.6 Threadless
• S.H.I.S Lower: IS52
• Bearing Type: Cartridge
• Crown Race: 30
• Color: Black
• S.H.I.S Upper: IS42