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A black Shimano GRX FC-RX820 1x 40T Chainring on a white background.

Shimano Chainrings

Shimano GRX FC-RX820 1x Chainring

Power Meter City August 20, 2025

Price range: $110.00 through $123.00

1x chainring for your Shimano 12-speed GRX RX610 and RX820 crankset
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Shimano GRX FC-RX820 1x Chainring

The Shimano GRX FC-RX820 1x Chainring is compatible with 12-speed Shimano GRX cranksets. The aluminum construction uses Hollowglide technology to create a stiff and light chainring. They are available in 40T and 42T sizes and fit Shimano HG chains.

 

Other Versions to Consider

GRX 810 1x: If you are using an 11-speed Shimano GRX groupset, we carry the Shimano GRX FC-RX810 1x Chainring.

GRX 820 2x: If you are using a 12-speed Shimano GRX groupset and want to maximize your gear range, consider Shimano GRX FC-RX820 2x Chainrings.

Compatibility

  • Crankset: Compatible with Shimano GRX RX610 and RX820 cranks
  • Chain: Compatible with GRX 12-speed drivetrains

Specs

  • Color: Black
  • BCD: 110x4
  • Speeds: 12-speed
  • Material: Aluminum
  • Weight: 40T - 78 grams | 42T - 88 grams
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