Shimano

GRX BL-RS717-L Left Brake Lever with BR-RX410 Hydraulic Disc Brake Caliper

Shimano GRX BL-RS717-L left brake lever with GRX BR-RX410 hydraulic disc brake caliper is a purpose-built solution for riders running a 1x or simplified gravel setup with a GRX ST-RX715 Di2 right Dual Control lever. By eliminating left-side shifting electronics, it delivers clean ergonomics and straightforward braking control, while the included flat-mount caliper focuses on predictable modulation, quieter running, and service-friendly maintenance for real-world gravel conditions.

Confidence and compatibility for modern GRX drop-bar builds

• Left brake-only lever for Di2 pairing - Shaped to match a GRX ST-RX715 Di2 right lever for a consistent hood feel while keeping the left side dedicated to braking
• Reduced complexity (no shift electronics) - Lighter, simpler lever choice for 1x drivetrains and riders who want fewer components to manage
• BR-RX410 flat-mount 2-piston caliper - Tuned for controllable braking with enhanced modulation and a quicker initial braking point, well-suited to changing gravel traction
• 10% wider pad clearance - Helps reduce rotor rub and brake noise, especially when conditions get dusty, gritty, or wet
• L05A-RF finned resin pads included - Finned backplate supports heat management for more consistent braking on long descents
• Reach Adjust + One Way Bleeding - Dial in lever fit at the bar and keep maintenance/bleeding more straightforward during service

Disc brake rotor sold separately.