The Shimano GRX ST-RX610 dual control lever delivers light and responsive shifting for mixed-terrain riding (Note: BR1057 is a left non-shift variation for 1x set ups) . 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.

• GRX BL-RX610 brake lever with textured hood ensures you're always in control, even on bumpy descents
• Anti-slip coating on GRX brake levers means that even in wet or muddy conditions that you'll always have Shimano's legendary stopping power on demand
• Reach Adjust mechanism allows the lever to be adjusted to suit any hand size, type of riding and individual rider preferences
• GRX BR-RX400 flat mount 2-piston brake caliper provides excellent heat dissipation with the help of Shimano's ICE technologies
• Convenient tool access with J-Kit allows for simple set up, maintenance, wheel replacment
• One Way bleeding makes cleaning and bleeding the system easy
• Includes L05A-RF pads with finned backplate and resin compound for enhanced heat dissipation
• Disc brake rotor sold separately

• Manufacturer Part Number: IRX6102DLF6SC100
• UPC: 192790640129