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Shimano Dura Ace - For highest expectations! The Dura Ace is Shimano's lightest, most ergonomic and most precise component group ever. It not only offers the finest mechanical performance, but also serves as a chassis for the revolutionary digital Di2 shifting system. The extra 11th. The additional 11th gear and numerous other improvements allow for truly dominant performance.
With Dura Ace you win. - 11-speed drive enables precise, racing gearshifts - Newly developed crankset with a 4-arm construction - Internal draw system reduces sliding resistance - More effective braking with new SLR-EV braking system
For frames with 86.5 x 41 mm mounting
external bearings for better weight distribution and more stability