The ST-R4020 Tiagra STI Bled With BR-RS405 Flat Mount Calliper - Right Front is a 11-Speed Shimano shifter from the Tiagra groupset. It uses a Flat Mount interface. Key Features Slim ergonomically designed Tiagra Dual Control Levers for hydraulic disc brakes offer powerful braking and effortless 11-Speed shifting Ergonomic short shift arc follows natural hand movement with inward shift stroke distance reduced for rapid and precise gear changes Hydraulic brake lever provides powerful, controllable and consistent stopping power with less effort especially from the hood position Hydraulic reservoir tank provides pad to rotor clearance auto-adjust maintaining braking performance during pad wear Kit includes ST-R4020 STI, BR-RS405 flat mount brake calliper with pads, hose, and gear cable (without rotor or adapter) Tuneable reach adjusters Easy bleed and clean hydraulic system, for use with Shimano mineral oil only Compatible with 11-Speed chains and RD-R4000/ RD-U6040 rear mech only Specification Specification Detail Groupset Tiagra Speed 11-Speed Mount standard Flat Mount Colour Black Weight 0.89 kg Fitment Right hand A well-finished control that matches the feel of the rest of the groupset.