The rs505 hydraulic disc brake mechanical sti from shimano is a great value sti lever for hydraulic disc brakes that offers powerful controllable and consistent braking and effortless shifting especially from the hood position vivid indexing provides a constant amount of shift lever force across all 11 sprockets and the ergonomic short shift arc follows natural hand movement the reach and free stroke adjustment enables you to adjust the feel and fit for any hand available in black only lef