The Shimano GRX ST-RX610 dual control lever delivers light and responsive shifting for mixed-terrain riding. The textured hood and anti-slip brake lever surface increase control on bumpy terrain. The GRX BR-RX400 2-piston flat mount hydraulic disc brake caliper features a low-profile design with ICE technologies to provide greater control and excellent heat dissapation for mixed terrain riding.

Brake Lever Actuation	Hydraulic
Rotor Included	No
Brake Caliper Mount	Flat Mount
Brake Lever Use	Right
Rear Der/Shifter Compatibility	Shimano Road
Drivetrain Speeds	12
Front Der/Shifter Compatibility	Shimano Road
Shifter/Derailleur Compatibility	Shimano
Color	Black
Hydraulic Fluid Type	Mineral Oil
Pad Compound	Resin
Hydraulic Hose Length	1700
Adjustable Reach	Yes
Adjustable Contact Point	Yes
Defined Color	Black
Position	Right/Rear
Compatibility	12-Speed