GRX ST-RX610 / BL-RX610 / BR-RX400 Freewheels you can perform rear shifts

you can perform rear shifts without the need to trim the front derailleur to avoid chain rub

and Eagle mechanical components

this wireless wonder has larger pulleys to increase drivetrain efficiency

Quicker engagement & shorter free stroke

GRX ST-RX610 / BL-RX610 / BR-RX400 Freewheels you can perform rear shiftsThe GRX 610 Dual Control Lever and GRX BR RX400 hydraulic brakes. The GRX 610 delivers light and responsive shifting. The ergonomic shifter design improves comfort and the textured, anti slip brake lever increases control. With a low profile flat mount design, the GRX BR RX400 hydraulic disc brakes provide greater control. All in the total package gives confidence and performance for mixed terrain riding. GRX ST RX610, 12 speed shifters and flat mount