Tailored for single-chainring drivetrains, the Shimano GRX BL-RX820-L brake lever enhances comfort and control during mixed-terrain rides, benefitting from Shimano's top-tier hydraulic disc brakes and an array of gravel-specific design enhancements. Shaped just as the GRX mechanical shift/brake lever is, it is made to be used optimally with a Flat Mount BR-RX820 hydraulic disc brake caliper.