Shimano GRX RX820 12 Spd Double Groupset - 11-36t

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keyboard_arrow_right Description

Shimano GRX RX820 12 Spd Double Groupset - 11-36t


The Shimano RX820 is a gravel-specific 2x12-speed groupset with a 31-48 tooth gradation at the front and an 11-34 or 11-36 tooth cassette at the rear. The set-up with two chainrings is suitable for all those who want to combine the flexibility of conventional road bike gears with off-road capability. The gear ratio has been chosen so that you can always pedal smoothly. You are fast on the flat and make good progress on climbs, no matter what the terrain is like. In keeping with the slogan " Undroppable" , you never get dropped and master every challenge. In any case, you will benefit from the reliability, durability and performance of the GRX RX820. With this groupset, Shimano has once again expanded the range of its gravel components to reflect the spirit, individuality, sense of freedom and community of gravel enthusiasts. The groupset also includes two shift/brake levers, a front derailleur, a rear derailleur, a Quick-Link chain and flat-mount disc brakes.


  • Series: GRX RX820
  • Application: Gravel
  • Shifters & Derailleurs: 2x, 12-speed (mechanical)
  • Brakes: disc, hydraulic (flat mount)


  • Crank: 170.0 mm, 172.5 mm, 175.0 mm (gradation 31-48)
  • Cassette: 11-34, 11-36
  • Front Derailleur: braze-on
  • Rear Derailleur: short (mid) cage


  • Conventional Shimano Road freehubs (8-/9-/10-/11-/12-speed)
  • Shimano Road 12-speed freehubs


  • Mechanical-hydraulic GRX 12-speed groupset for gravel use (crank, cassette, chain, front derailleur, rear derailleur, brakes)
  • Flexible, reliable 2x set-up designed for an even cadence
  • Wide-range road bike cassette (11-34, 11-36 T)
  • Light and efficient Hollowtech II crank (31-48 T) with hollow crank arms
  • Smooth and defined shifting
  • Great brake control on mixed terrain
  • Gravel-specific lever and lever body ergonomics
  • Rear derailleur with Shadow Plus technology to prevent chain drop
  • Chain with 126 links


Shimano GRX RX820 2x12 31-48 groupset, consisting of:

  • 1 x Shimano GRX crankset (FC-RX820-2)
  • 1 x Shimano GRX rear derailleur (RD-RX820)
  • 1 x Shimano GRX front derailleur (FD-RX820)
  • 1 x Shimano Ultegra cassette (CS-R8101-12)
  • 1 x Shimano XT / Ultegra Quick-Link chain (CN-M8100)
  • 2 x Shimano GRX disc brakes (BR-RX820 + ST-RX820), front and rear
  • 1 x Shimano SM-BH90-JK-SSR brake hose, 1000 mm (front)
  • 1 x Shimano SM-BH90-JK-SSR brake hose, 1700 mm (rear)
  • 2 x pair Shimano resin brake pads with cooling fins
  • 1 x disc brake adapter for front 140/160 + 160/180 mm
  • 2 x hose connection sets
  • 2 x type A caliper bolts for front wheel
  • 2 x caliper bolts for 25 mm frame diameters, rear wheel
  • 1 x Shimano aluminium cassette lockring
  • 1 x Shimano master link
  • 1 x Shimano crank bolts
  • 2 x shifter cable
  • 1 x cable housing for front wheel
  • 2 x cable housings for rear wheel
  • 1 x Shimano OT-RS900 cable housing for the rear deailleur
  • 1 x long nose end cap for OT-RS900
  • brake set ready for assembly, filled, bleeding is recommended after assembly

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