The Shimano GRX BL-RS717L is a left-only hydraulic brake lever option designed to pair perfectly with a right GRX ST-RX715 Di2 Dual Control lever, thanks to its matching shape and ergonomics. By skipping the shifting electronics, it provides 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. Despite its compact construction, the system is quieter and easier to maintain.

Brake Lever Actuation	Hydraulic
Brake Caliper Type	Flat Mount
Rotor Included	No
Brake Lever Use	Left
Color	Black
Hydraulic Fluid Type	Mineral Oil
Pad Compound	Resin
Hydraulic Hose Length	1000
Adjustable Reach	Yes
Adjustable Contact Point	Yes