Shimano GRX RX820 2x12-Speed ??Gravel Groupset
The Shimano GRX RX820 groupset is specifically designed for gravel riding and offers a combination of precise shifting performance, reliable braking power, and robust construction. This group includes the key components for a 2x12-speed drivetrain, ideally suited for a wide variety of terrain.
Components Included:
Shift/Brake Levers: Shimano GRX ST-RX820 (left + right)
Brake System: Shimano GRX BR-RX820 disc brake calipers (front + rear)
Crankset: Shimano GRX FC-RX820-12 with 48/31 teeth Hollowtech II, 172.5mm
Front Derailleur: Shimano GRX FD-RX820
Rear Derailleur: Shimano GRX RD-RX820
Cassette: Shimano CS-R8100 (11-34 teeth)
Chain: Shimano CN-M8100 with Quick Link
Note: Brake rotors and bottom bracket are not included but can be purchased separately.
Key Features of Individual Components
Shimano GRX ST-RX820 Shift & Brake Levers
The ergonomically shaped shift and brake levers offer comfortable handling for various handlebar shapes. Thanks to the non-slip coating, the grip remains secure even in changing conditions. Furthermore, the raised pivot point provides improved brake control, while the reach can be individually adjusted.
Shimano GRX BR-RX820 Disc Brake Caliper
The hydraulic disc brake caliper guarantees consistent braking performance on challenging terrain. Ice Tech technology efficiently dissipates heat, resulting in better braking performance. The Flat Mount attachment ensures compact integration on the frame or fork.
Shimano GRX FC-RX820-12 Crankset
This 2x12-speed crankset features an optimized chainline that provides more clearance for wider tires. The combination of 48 and 31 teeth provides a versatile gear range for various types of terrain. The 4-arm design of the aluminum chainrings is compatible with Shimano HG 12-speed chains.
Shimano GRX FD-RX820 Front Derailleur
With a 16-tooth capacity, the FD-RX820 harmonizes perfectly with the FC-RX820 crankset. Thanks to the extended chainline of the GRX series, wider tires can also be used without any problems. Its precise and smooth shifting mechanism ensures a natural shifting feel.
Shimano GRX RD-RX820 Rear Derailleur
This rear derailleur was specifically designed for gravel riding. The Shadow RD+ system minimizes chain slap and ensures stable, quiet shifting, even on rough terrain. An additional on/off switch locks the derailleur cage and reduces unwanted movement. Compatible with cassettes from 11-32 to 11-36 teeth.
Compatibility & Technical Details
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Rear derailleur: Only compatible with Shimano CS-R8100 cassettes (11-32 or 11-34 teeth)
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Mounting: Flat mount for brake caliper, standard mount for front derailleur & Rear derailleur
Crankset: 2.5 mm wider than standard for increased tire clearance
Chain compatibility: HG 12-speed chains
Shimano SKU numbers
Shifter/brake levers: IRX8202DLF6SC100A + IRX8202DRRDSC170A
Crankset: IFCRX8202DX81
Front derailleur: IFDRX820F
Rear derailleur: IRDRX820
Cassette: ICSR810112134
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Chain: ICNM8100126Q
Scope of delivery: Shimano GRX400 groupset without brake discs and bottom bracket.