Shimano xt di2 m8050 11 speed rear mechthe xt di2 m8050 11 speed rear mech blends powerful performance with precise shifting that remains crisp and consistent over time the low profile geometry and chain stabiliser ensure drivetrain security while the electronic wire transmission maintains consistent performance in all weather and trail conditions featuresshifting motor responds instantly to rider input e tube electric wire transmission guarantees consistent performance in all conditionsaccura