Shimano GRX ST-RX610 Shift/Brake levers Gravel has never been better The Shimano GRX is the first truly gravel-specific groupset, and this new 12-speed addition to the GRX family takes Shimano's decades of experience and further refines it for the world of gravel and offroad riding. The GRX ST-RX610 Shift/Brake Levers are at the heart of the GRX 610-series cockpit, and features a gravel-specific hood shape, lever design, and texture, to keep control while riding on challenging terrain. The textured rubber hood increases grip, while the anti-slip lever coating increases control, especially in wet conditions. The shift lever action is optimized for quick, easy shifts with minimal input, and when paired with the included GRX brake calipers, the ST-RX610 levers offer impressive braking control for wherever the ride takes you. Features12-speed compatible to make use of the increased gear range, refined shifting, and next-generation technology of 12-speed GRX components Textured lever hood and an anti-slip lever coating for increased control in bumpy and wet conditions Impressive braking control with Shimano BR-RX600 brake calipers Reach adjust for improved control and ergonomics for every rider Assembled pre-bled set including BR-RX610 brake calipers with finned brake pads and a flat-mount design Specifications Shift Lever ST-RX610Brake Caliper BR-RX600Brake Caliper Mounting Type Flat Mount Brake Pad L05A Resin (finned type)Shift Lever Speeds (rear)12 | Shimano | Grx St-Rx610 Shift/brake Levers St-Rx610(L) Rx400(F) | Aluminum