Shimano Ultegra 11-speed is here, and the CS-6800 cassette's 11th cog promises you more gearing options for spinning, sprinting, or climbing. And don't forget that 11-speed Ultegra, like its superstar Dura-Ace kin, features gram-shaving technology such as slimmer, stronger cogs, and slightly narrowed cog spacing allowing for less material use, as well as smoother, more precise shifting. And for you mountain riders and touring goers, there is an 11-32t version of this cassette available here at Nashbar (product #SH-CS6800C) for an ultra-low gearing option.