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Shimano GRX RX820 2x Crankset

Niel Ubod April 12, 2024


Shimano GRX RX820 2x crankset for your gravel or cyclocross bike

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Shimano GRX RX820 2x Crankset

The Shimano GRX RX820 2x Crankset is Shimano’s latest update to their gravel groupset which gives riders a 2×12 drivetrain that can tackle any adventure. The 48/31 chainring gives you a large enough front chainring for long descents while also providing a small enough chainring for steep and technical climbs. When paired with Shimano’s 12-speed cassette, this crankset provides an excellent gear range for varied terrain.

These crank arms also use Shimano’s Hollowtech II technology which makes them lightweight and stiff, providing both durability and power transfer. Additionally, you can combine the RX820 crankset with any of Shimano’s GRX 610-series components.


Key Product Details


This Shimano GRX crank works with Shimano 24 mm bottom brackets and 12-speed groupsets. See Compatibility tab for more details.

Key Features:

Shimano’s latest gravel crank for 2x drivetrains, excellent gear range for varied terrain, works with 1x or 2x GRX chainrings. See Specs tab for more details.

Advice From Our Staff:

Shimano GRX cranksets provide great shifting and performance. This crankset paired with a 12-speed cassette provides great gear range for all types of off road adventures. Because a 12-speed cassette provides smaller jumps between gears, our staff highly recommends this crankset for gravel and cyclocross riders of all abilities.


Options For This Crankset

  • Crank arm lengths: 170 mm | 172.5 mm | 175 mm


Other Versions to Consider

GRX RX820 1x Crankset: If you are looking for a 1x crankset that will remove the need for a front derailleur, consider the Shimano GRX RX820 1x Crankset. A 1x system reduces your gear range but provides significant weight savings and will simplify your shifting.


This crankset is compatible with Shimano 24 mm bottom brackets and 12-speed groupsets.


  • Interface: 110/80 BCD 4-Bolt
  • Crank Arm Material: Aluminum
  • Chainrings: 2x (however you can put 1x rings on it as well)
  • Speeds: 12
  • Spindle Size: 24 mm
  • Chainline: 47 mm
  • Q-factor: 151 mm
  • Weight: 710 grams

Tools Needed for Installation

You will need the following tools for installation of this product. You can purchase many of these commonly used tools in our store.

  • Shimano Crank Arm Cap Tool
  • 5 mm Allen key

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