The 11 speed Dura-Ace R9100 rear derailleur has been redesigned for lighter operation with the help of new low-friction polymer-coated cables. Shifting effort is now more even across the range with similar force required at both ends of the cassette. Short Cage. Dark Grey.
KEY FEATURES:
- Stable shifting performance
- Pulley follow-up in certain distance
- SHIMANO SHADOW RD construction
- Low profile rear derailleur design
- Race endurance for less damage in crush
- Adapted for race specific frame design
The all-new 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 R9100 11-speed cassette with numerous gearing options to cover all situations.
Leading edge design materials and construction reduce weight improve stiffness and enhance control.
Various derailleur systems were designed and built as far back as the late 1800s. A French bicycle tourist writer and cycling promoter Paul De Vivie (1853-1930) invented a two speed rear derailleur in 1905 which he used on forays into the Alps and we wonder if 20 gears are enough. Since then there have been many advancements in the number of gears materials and reductions in weight.
