The Shimano GRX RX820 groupset embodies Shimano’s commitment to creating the ultimate riding experience for gravel and off-road enthusiasts. It combines strength, precision, and ergonomics — engineered specifically for the demands of gravel riding.

Note: Supplied without chain

• Smooth and precise shifting: 12-speed mechanical system for reliable performance in all conditions.

• Ergonomic design: Reduces hand pressure and improves control with anti-slip surface.

• Optimized for flared handlebars: Ensures confidence and comfort on technical terrain.

Crankset

• 2x12 configuration: Reliable setup with 48T-31T chainrings.

• Gear range: Compatible with 10-45T and 10-51T cassettes.

• Crank lengths: Available in 170 mm, 172.5 mm, and 175 mm.

Front Derailleur

• Shimano GRX RX820 front derailleur (brazed-on): Provides accurate and stable shifting with double cranksets.

• Improved cable routing: Smooth shifting under load.

• Extra tire clearance: Fits tires up to 42 mm wide.

• Rugged design: Built to handle mud, dust, and vibration.

Rear Derailleur

• Integrated clutch: Keeps the chain stable on rough terrain.

• Easy maintenance switch: Simplifies wheel changes.

• Compatible with 10-51T Micro-Spline cassettes.

Groupset contents

• Shifters + hydraulic calipers (front & rear)

• Crankset 48-31T

• Front derailleur (brazed-on)

• Rear derailleur

• Cassette 11-34T (Shimano 105/GRX CS-R7101)

• Brake rotors 140 mm & 160 mm (RT-MT800)

• Brake hoses and shift cables only inside, not outside shifting cables