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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.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
| Brake Lever Actuation | Hydraulic |
| Brake Lever Use | Left |
| Color | Black |
| Defined Color | Black |