Shimano dura ace 9000 hollowtech ii compact chainset chainsets
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 stiff