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Shimano Ultegra FC 6600 Crankset The Shimano Ultegra FC 6600 Crankset and bottom bracket combines race-proven hollow forging technology with the integrated crankset & bottom bracket. Weight is reduced while rigidity and power transfer is radically increased. In addition to Hollowtech II integrated design; the crank arms are hollow which provide amazing strength and rigidity at a light weight. Finally, the SG-X chainrings on the Shimano Ultegra FC 6600 Crankset enable super smooth front shifting. Special tooth profiles, pick-up spikes and ramps help make the front derailleur shifts quiet, easy and trouble free for you the rider. Bottom Bracket Cups Are Sold Seperately HERE |
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