Ultegra has long been recognized as a solid performer and thanks to Shimano's Systems Engineering approach the 6700 series continues to deliver. Lighter, more stylish and advanced by the latest Dura-Ace technologies, new Ultegra is a beautifully balanced group with optimal performance and specifications. Its unprecedented racing DNA takes shifting and braking to another level, with a with a weight reduction of 150g versus 6600 series.
High performance seals : Reliable labyrinth seal design
Adjustable angular contact bearings : Provides increased bearing life and adjustable range
Compatible with 10, 9 and 8-speed cassettes
Smooth rolling : Super polished ball races for high precision, durability and smooth rotation