Shimano GRX BL-RX825-L Brake Lever - Left For Hydraulic Disc Brake Lever OnlyShimano GRX BL RX825 L Brake Lever Left For Hydraulic Disc Brake Lever Only. The GRX BL RX825 L brake lever (for Di2) is a left brake only lever option that pairs perfectly with a right ST RX825 Di2 dual control lever. It is designed for gravel and mixed terrain riding. The ergonomic lever features raised hoods ribbed surface texture and an anti slip coating on the brake lever for increased security and control. The hood body is optimized for seamless