Shimano GRX ST-RX825 Left Di2 Shifter & Front Disc Brake Caliper

Shimano integrated road / gravel shifter — the brake-plus-shift lever at the hood. Ergonomics, reach-adjust, and the internal shift mechanism are what separates a good shifter from a great one on long rides; the named series here is the performance tier that determines where in the Shimano range this unit sits. GRX is Shimano's gravel / adventure groupset — clutch-equipped derailleurs, wider-range gearing, ergonomics tuned for on / off-road riding and hood-level grip on rough surfaces. This is the Shimano GRX ST-RX825 Left Di2 Shifter & Front Disc Brake Caliper.