Shimano GRX ST-RX820 Rear Disc Brake

Shimano GRX ST-RX820 levers deliver light and responsive mechanical shifting for mixed-terrain riding and racing (Note: IRX8203DLF6SC100A and IRX8204DLF6SC100 are left non-shift variations for 1x set ups). The GRX BR-RX820 2-piston disc brake caliper brings a high level of control to gravel cycling with enhanced modulation and a quick initial braking point. Despite its smaller construction, the system is exceptionally quiet and easy to maintain

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SKU: BRK-01195

Details / Shimano GRX ST-RX820 Rear Disc Brake


  • GRX BL-RX820 left 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
  • SERVO WAVE technoloy provides fast initial pad travel to quickly contact the rotors followed with the power multiplication factor to give fast pad-to-rim contact to apply greater braking power with improved control
  • Gravel-specific lever and bracket ergonomics optimized for use with flared bars
  • 2-piston caliper features 10% wider pad clearance to decrease brake noise
  • One-way maintenance-friendly bleeding process for quick and easy prevention of air bubbles in the hydraulic system
  • Includes finned L05A pads with a resin compound for enhanced heat dissipation
  • Convenient tool access with J-Kit allows for simple set up, maintenance, wheel replacment
  • Front brakes Include bracket for 140/160 rotors (assembled for 160mm)
  • Dropper Remote Lever version features Integrated dropper post actuation with 10mm cable stroke lets you stay focused

More Information

Manufacturer Part Number
Product Condition
New in Box
Brake Compatability
Disc Brakes
Brake Compatibility
Disc Brake


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