The Shimano GRX BL-RS717L is a left-only hydraulic brake lever option that is designed to pair perfectly with a right GRX ST-RX715 Di2 Dual Control lever thanks to its matching shape and ergonomics. Skipping all the shifting electronics, it's a lighter, simpler left brake lever option for times when less is more. The RS717 brake lever is paired with a GRX BR-RX410 flat mount disc brake caliper that brings a new level of control to gravel cycling with enhanced modulation and a quicker initial braking point. And despite its compact construction, the system is quieter and easier to maintain.Brake only left hydraulic lever is designed to pair with a GRX ST-RX715 Di2 right shift/brake leverProvides a lighter, simpler lever option by eliminating the shifting electronicsLets riders dial in their preferred ergonomics with easy Reach-AdjustGRX BR-RX410 flat mount 2-piston brake caliper has 10% wider pad clearance to decrease brake noiseIncludes L05A-RF pads with finned backplate and resin compound for enhanced heat dissipationOne Way bleeding makes cleaning and bleeding the system easyDisc brake rotor sold separatelyItem SpecificationsAdjustable Contact PointYesAdjustable ReachYesBrake Caliper TypeFlat MountBrake Lever ActuationHydraulicBrake Lever UseLeftColorBlackHydraulic Fluid TypeMineral OilHydraulic Hose Length1000Pad CompoundResinRotor IncludedNo Shimano GRX BL-RS717-L Brake Lever with BR-RX410 Hydraulic Disc Brake Caliper Disc Brake & Lever UPC: 192790079660