• Shimano GRX RX820 2x12 Speed Groupset Kit
  • Shimano GRX RX820 2x12 Speed Groupset Kit
  • Shimano GRX RX820 2x12 Speed Groupset Kit
  • Shimano GRX RX820 2x12 Speed Groupset Kit
  • Shimano GRX RX820 2x12 Speed Groupset Kit


Shimano GRX RX820 2x12 Speed Groupset Kit


Location: Supplier Warehouse (Add 2-3 Buisness Days): IN STOCK

Location: Instore at Fitzroy Location: IN STOCK

Shimano GRX – United in Gravel

Gravel cycling is not meant to be overly complicated. The heart and soul of cycling’s drop bar, dirt road discipline is rooted in simplicity, inclusivity, and adventure. No ride is out of bounds. All are welcome to join. Gear should be functional and reliable but need not break the bank.

That’s why whether you’re a grizzled gravel cycling veteran or brand new to the road (or trail) less traveled, you’ll appreciate the latest iteration of SHIMANO’s groundbreaking—and industry-first-gravel-specific GRX component group. Designed to help you get the most from your next unpaved adventure, RX820 delivers top-tier performance without an over-the-top price.

Three new 12-speed GRX drivetrains feature SHIMANO’s legendary precise and reliable mechanical shifting with different gearing ranges to cover the full spectrum of riders and rides.


For riders seeking the best of both worlds, the new 2x12 RX820 UNDROPPABLE drivetrain is the choice. Utilizing a gravel-optimized 48/31 front chainring paired with an 11-34 or 11-36 cassette, this setup delivers an ultra-wide gear range so you can spin a comfortable cadence whether cruising the flats, smashing endless dirt road rollers, or tackling a massive backcountry climb. 

This setup delivers precise mechanical shifting both front and rear and an integrated SHADOW RD+ chain stabilization for ultimate security over bumpy terrain. The gravel-specific 2x12 option maintains tighter rear cassette gear steps, ideal for subtle cadence changes during competitive racing and spirited weekend group rides. And the 2x12 setup seamlessly interfaces with most existing 700c wheels thanks to its use of the tried-and-true HG freehub body design. 


  • GRX ST-RX820 | brake/shift lever (STI, left + right)
  • GRX BR-RX820 | disc brake caliper (hydraulic, Flat Mount, front + rear)
  • GRX FD-RX820 | front derailleur (braze-on)
  • GRX RD-RX820 | rear derailleur (Shadow RD+)