The Shimano Ultegra RD-R8050-SS is an 11-speed Di2 electronic rear derailleur designed for road bicycles, featuring a short cage that supports cassette ranges from 11-25T to 11-30T. It uses Shimano’s Shadow RD design with direct rear mount, providing a sleek low-profile appearance that minimizes damage risk. Made from stainless steel, it offers durability with precise and intuitive electronic shifting ideal for riders seeking smooth, reliable gear changes. Compatible primarily with Shimano 11-speed Di2 road groupsets, it pairs with front derailleurs supporting up to 16T chainring difference. Weighing approximately 242 grams, the RD-R8050-SS balances weight savings and robustness, suitable for race or endurance riders preferring compact cage geometry. Overall, this derailleur suits cyclists aiming for electronic shifting precision and compact design on 11-speed Shimano Ultegra Di2 setups.