Shimano XT RD-M8000 Rear DerailleurShimano has been making some of the best bicycle components since the 1970's and they continue to produce some of the most sought after components in the industry. XT is Shimano's work horse mountain bike group and features some of the finest technology and produces an incredibly clean and reliable shift. The newest generation of XT is not only new and shiny, but it also comes with all new technology. The Shimano XT RD M8000 Rear Derailleur has been