Shimano GRX, with its gravel specific ergonomics, optimized gearing options, rugged reliability, and quiet and stable drivetrain, sets itself apart from the rest of the component world The GRX series offers premium performance at an incredible value, with thoughtful ergonomic designs and gravel-centric gearing for all manners of unpaved adventures. Features: - GRX hydraulic disc brake STI's give you control, modulation and power with minimal effort in all riding conditions - Raised hood head prevents hand misalignment and slippage - Anti-slip texture and brake lever coating gives higher braking efficiency and reduces fatigue on long rides - Weight: 306 g Product specification: - MODEL NO: ST-RX600-R - SERIES: GRX 11-speed - Color: Series color - Average weight: 307 - Bracket cover color: Standard - Shifter type: DUAL CONTROL LEVER - Shift lever: Rear speeds: 11 Max. multiple shifts (main lever/rear): 2 Compatible rear derailleur type: Road 11-speed - Brake lever: Brake hose (kit): SM-BH90-JK-SSR, SM-BH90-J-SSR Hose joint: Straight Brake hose color (kit): Black Recommended brake caliper: BR-RX810 Oil: SHIMANO Mineral - Reach adjust - Funnel bleeding - Clamp band: Diameter (mm): 23.8-24.2 - Shifter lever body Release: Resin & Steel - Shift lever cable: Outer casing (Lever side): OT-SP41 Outer casing (Rear derailleur side): OT-RS900 Inner cable: OPTISLICK Left shifter is 2-speed, right shifter is 11-speed. Genuine, brand new, boxed Shimano product - Biketart are an official UK Shimano stockist.