Shimano RD-R8050 Rear Derailleur

DescriptionShimano RD-R8050 Ultegra Di2 11-speed rear derailleur E-tube, SS cage.Ultegra Shadow design with Di2 technology, shifting is easy and precise,  for the front or rear derailleur  select the correct gear. Low profile Shadow design construction minimises risk of damage in a crash. Programmed automatic motion at the touch of a switch makes it quick, smooth and effortless. The removal of traditional mechanical cables in favour of electrical wires not only eliminates poor shifting caused by contaminates, corrosion and stretching, but gives effortless gear shifts. Derailleur contains a saver (fuse) function,  the inner structure is protected from strong knocks. High tolerance cold forged aluminium link plates and body construction is extremely light and durable. Four self-lubricating micro-machined fluorine-coated link pivot bushings give low-friction shifting. 11-speed E-tube Di2 compatible. Wide gear ratio compatible with 11-25 up to 11-30TColor. ‎Standard Size. ‎One Material type. ‎Other Included components. ‎Bike Parts Batteries included?  ‎No Brand. ‎SHIMANO Department. ‎Unisex Manufacturer. ‎Shimano Item model number ‎IRDR8050SS Product Dimensions ‎15.39 x 12.9 x 9.19 cm; 300 Grams ASIN ‎B073XTZ49K