The 6800 series Ultegra rear hubs use a new digital cone adjustment system for reduced axial force and smooth rolling bearings. The steel freehub body is designed for 11 speed Shimano cassettes. 9/10 speed cassettes will work if you use the included 1.85mm spacer.
Q/R skewer included with hub
32h or 36h options
Smooth Rolling, Long Lasting Bearings
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