Shimano GRX FC-RX820-2 2x12-speed gravel bike crankset

The Shimano GRX FC-RX820-2 2x12-speed crankset is a must-have for gravel cyclists looking for the perfect balance between efficiency, versatility and performance on mixed terrain. Specially designed for gravel and cyclocross, this double chainring (48-31 teeth) offers a wide range of developments to tackle both long flat sections and technical climbs, while maintaining a fluid pedalling cadence.

Manufactured with HOLLOWTECH II technology, it combines increased rigidity and lightness, guaranteeing optimum power transfer with every pedal stroke. Available in different crank lengths (170, 172.5 or 175 mm), it adapts to different postures and body shapes. The 47 mm chain line and Q-factor designed for gravel frames ensure smooth compatibility with the majority of standard 2x12 drivetrains.

Key features:

• 2x12-speed configuration with twin 48-31T chainrings for great versatility
• HOLLOWTECH II design: effective rigidity and controlled weight
• Wide range of ratios for varied terrain
• Available in several crank lengths
• Optimised for gravel and cyclocross

Technical specifications :

- Reference: FC-RX820
- Weight: 710 grams
- Crank lengths: 170 mm, 172.5 mm, 175 mm
- Cogs: 48-31T
- Tighter ratios for faster pedalling
- Q-factor: 151 mm

FAQ - Shimano GRX FC-RX820-2

What is the chainring configuration?
The crankset comes with a 48/31-tooth chainring combination, ideal for a wide variety of terrain.

Is it suitable for modern gravel frames?
Yes - with a 47mm chainstay and a gravel Q-factor, it offers optimum compatibility with most gravel and cyclocross frames.

What crank lengths are available?
It is available in 170 mm, 172.5 mm and 175 mm, allowing adjustment to suit the rider's pedalling position and size.

Does it come with a bottom bracket?
No, the bottom bracket is supplied without a bottom bracket (sold separately).

Compatible with which chain?
It works with Shimano HG 12-speed chains.