The Shimano GRX ST-RX400 10-speed hydraulic disc/brake lever provides greater control on mixed terrain. Features: Gravel inspired Dual Control shift/brake lever and bracket ergonomics Anti-slip brake lever Same light shifting operation as top tier systems Tooled reach adjust allows for lever to be adjusted to fit multiple hand sizes and riding preferences Specifications: Shifter Style: Lever (Road) Speed: 2 x 10 Speed Derailleur Compatibility: Shimano GRX 400, Tiagra 4700 (10 Speed) Shift Mechanism: Cable Actuated Adjustable Reach: Yes Brake Type: Hydraulic Brake Fluid: Mineral Oil Brake Mount: Flat Mount Brake Pads: Organic/Resin Hose Length: 1000mm (Left), 1700mm (Right) Color: Black Weight: 307g (Per Side)