TheShimano ST-RS505 STI Pairare great value STI levers for hydraulic disc brakes offer powerful braking and effortless 11-speed shifting. Vivid indexing provides a constant amount of shift lever force across all 11 sprockets. The ergonomic short shift arc follows natural hand movement for added comfort. Hydraulic brake lever provides powerful, controllable and consistent stopping power with less effort, especially from the hood position. Shimano ST-RS505 STI Pair Features Hydraulic reservoir tank provides pad to rotor clearance auto-adjust maintaining braking performance during pad wear Kit includes ST-RS505 STI, BR-RS505 flat mount brake callipers with pads, hoses, and mineral oil (without rotors or adapters) Reach and free stroke adjustment enable custom feel and fitment for all hands Easy bleed and clean hydraulic system, for use with Shimano mineral oil only