Shimano GRX ST-RX400/BR-RX400 Hydraulic Disc Brake and Brake/Shift Lever - Left, 2x10-Speed, Flat Mount, Finned Resin Pads, Black Standard Tubes Micro Spline technology delivers lightweight

Micro Spline technology delivers lightweight aluminum freehub body to reduce weight and utilize a 10 tooth top gear

125696-Q0-L36G04

5" (16cm) to 16

156240-Q0-L

WT6022 SA4075

Shimano GRX ST-RX400/BR-RX400 Hydraulic Disc Brake and Brake/Shift Lever - Left, 2x10-Speed, Flat Mount, Finned Resin Pads, Black Standard Tubes Micro Spline technology delivers lightweightThe Shimano GRX ST RX400 10 speed hydraulic disc brake lever provides greater control on mixed terrain. Gravel inspired Dual Control shift brake lever and bracket ergonomics Anti slip brake lever Same light shifting operation as top tier systems Tooled reach adjust allows for lever to be adjusted to fit multiple hand sizes and riding preferences Compatible only with FD 4700 and FD RX400 front derailleurs, and RD RX400 and RD 4700 rear derailleurs