Cook Bros. Racing Stainless Headsets feature two super-smooth, 4545, sealed bearings covered by a coating of titanium nitride and filled with stainless steel balls. The titanium coating delivers a low friction coefficient, increased corrosion resistance and smoother rolling surfaces. Stainless steel balls further increase corrosion resistance. Cruise longer and smoother. A reusable, anodized aluminum, compression plug eliminates the need for a star nut and works with all 1 1/8-inch steerer tubes,even carbon fiber, making this the most versatile headset system ever.

• CNC machined, 6061-T6 aluminum top cap, cups, compression ring and crown race.
• Titanium nitride coated 45×45 bearings with stainless steel balls which can also be used as integrated headset without cups.
• Aluminium expander plug is compatible with chromoly, aluminum and carbon fiber 1 1/8 steerer tubes