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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 lever Provides a lighter simpler lever option by eliminating the shifting electronics Lets riders dial in their preferred ergonomics with easy Reach-Adjust GRX BR-RX410 flat mount 2-piston brake caliper has 10% wider pad clearance to decrease brake noise Includes L05A-RF pads with finned backplate and resin compound for enhanced heat dissipation One Way bleeding makes cleaning and bleeding the system easy Disc brake rotor sold separately
| 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 |