The Shimano Ultegra ST-6770-R is a right-hand electronic brake and shifter combo lever designed for road bikes using Shimano’s Di2 electronic shifting system. This shifter supports both 10-speed and 11-speed setups, allowing compatibility with Ultegra and Dura-Ace Di2 groupsets from this generation. It is constructed from a durable blend of plastic and aluminum with a black finish, integrating smooth and precise electronic shifting buttons alongside ergonomic brake lever design.

Weighing approximately 160 grams, it offers a notable weight reduction compared to traditional mechanical levers, improving overall bike performance without sacrificing durability. The lever uses the EW-SD50 cable connection, connecting seamlessly to Shimano’s E-Tube electronic system. This shifter is ideal for riders looking to upgrade or replace their right-side Di2 lever and requires matching Di2 electronic derailleurs and battery to function. It supports programmable shifting functions via Shimano’s software, and while it does not support synchronized shifting firmware updates, it allows flexible operation with other 10 or 11 speed Di2 components of compatible generations. Buyers should confirm compatibility within their Di2 setup due to system requirements and firmware versions. Installation requires knowledge of Shimano Di2 wiring and setup protocols for optimal performance.