Shimano GRX FC-RX820-2

No, the FC-RX820-2 is specifically engineered for Shimano's 12-speed gravel drivetrains. It will not function correctly with 11-speed chains or cassettes.

This crankset features a 48/31 tooth chainring combination. This sub-compact gearing is designed to provide a wide range, allowing you to maintain speed on flats while still having a low enough gear for steep, loose gravel climbs.

No, the bottom bracket is sold separately. It uses the standard Shimano Hollowtech II interface, so you will need to ensure you have the correct bottom bracket shell compatibility for your specific frame.

The hollow-forged construction removes excess material from the crank arms to reduce weight without sacrificing structural integrity. This results in a stiffer crankset that transfers your power more efficiently to the drivetrain, especially when you are standing up to pedal on climbs.

Yes, the chainrings are replaceable. It uses a 110/80 mm bolt circle diameter, which is specific to the GRX 2x system, so you will need to source compatible GRX-specific rings if you decide to change your gearing in the future.

While it uses the Hollowtech II standard, this crankset is designed specifically for gravel bikes with a 68mm or 73mm bottom bracket shell width. You should verify your frame's bottom bracket shell standard and chainline requirements before purchasing, as mountain bike frames often have different spacing.