Shimano GRX FC-RX820-2 Chainring

No, this specific chainring is engineered exclusively for Shimano's 12-speed GRX drivetrain systems. It will not function correctly with 11-speed setups due to differences in chain width and tooth profile.

While it features a 110mm BCD, it uses an asymmetric 4-bolt pattern specific to Shimano GRX cranksets. It is not compatible with standard symmetric 110mm BCD cranksets from other manufacturers.

Gravel riding exposes your drivetrain to significant amounts of dirt, sand, and grit, which act like sandpaper on metal components. The hard-anodized finish creates a much tougher surface layer that resists this abrasive wear, significantly extending the lifespan of the teeth.

This 31T inner ring is designed to be paired with the matching 48T outer chainring for the GRX FC-RX820-2 crankset. Mixing it with significantly different outer ring sizes may compromise the shifting ramps and pins, leading to dropped chains or sluggish performance.

For the best shifting performance, we strongly recommend using a Shimano 12-speed chain. While other chains might physically fit, Shimano's tooth profiles are optimized specifically for the link shape and tolerances of their own HG+ chains.