And with single-wire E-tube connection to the rest of the system, the front derailleur is able to automatically trim itself as you shift the rear derailleur, eliminating chain rub. The all-new 2013 Dura-Ace group is the result of 40 years of development and innovation, tested to the limit at the highest level of competition in road racing, time trials and cyclo-cross. Dura-Ace delivers concentration, control and confidence with slick, fast, accurate performance that you can depend upon without distraction. Dura-Ace now has an 11-speed cassette with numerous gearing options to cover all situations. Leading edge design, materials and construction reduce weight, improve stiffness and enhance control….
– Shimano Dura Ace 9070 Di2 11 Speed Rear Derailleur Rear Derailleurs – £344.99 (RRP – £)
