Shimano Dura-Ace 9120 Hydraulic Disc Dual Control Lever and Brake System - Front. Disc brakes are taking road bikes by storm. What started on 'cross and endurance bikes has now moved to race bikes, which has spurred some serious technological investment in the technology. A few years ago Shimano introduced the non-series R785 and R685 hydraulic disc levers, which were a step in the right direction. They worked well, and were certainly more than functional. But they were also a little bulky and bulbous looking, and lacked some of the refinements discerning cyclists would expect from Dura-Ace. Shimano took the introduction of disc brakes at the pro-cycling level as an opportunity to redesign their levers, and the result is the Dura-Ace 9120 hydraulic disc dual control lever and brake system. Only slightly larger than the standard 9100 STI lever, the hydraulic lever maintains much the same shape and form factor to make the two largely the same. That means no compromises in ergonomics, bike fit, or anything else just to enjoy the benefits of disc brakes. And let's chat about those benefits for a minute. Shimano has truly refined their hydraulic disc technology to give you the smoothest, most consistent and easy to use braking performance around. Unaffected by weather, perfect for rough terrain or long descents, hydraulic disc brakes offer a level of control and easily controlled modulation that was heretofore unheard of on a road bike. Plus, you get all this with the benefits of Dura-Ace level STI shifting--which has taken mechanical shifting to a whole new level of precision that has to be experienced to believed. So whether you're building up a gran fondo crusher, a new disc brake road bike, or just putting the finishing touches on your dream bike, the Dura-Ace 9120 levers are the disc brake lever of choice. Oh...and did we mention that these levers are fully backwards compatible with Dura-Ace 9000, Ultegra 6800 and 105 5800 derailleurs? This set includes the lever, caliper and hose
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