The shimano st rs505 hydraulic disc brake sti lever a great value sti lever for hydraulic disc brakes offer powerful braking and effortless 11 speed shifting the hydraulic brake lever provides powerful controllable and consistent stopping power with less effort especially from the hood position shimano st rs505 hydraulic disc brake sti lever features vivid indexing provides a constant amount of shift lever force across all 11 sprockets ergonomic short shift arc follows natural