Shimano GRX is divided into three basic subgroups:
- RX800 – 11-speed kit at Shimano Ultegra level – available in mechanical and electronic (Di2) configuration
- RX600 – mainly an 11-speed kit at the level of the Shimano 105, but a 10-speed kit is also possible – available in a mechanical configuration
- RX400 – Shimano Tiagra level 10-speed kit – available in mechanical configuration
The division into three subgroups seems straightforward, but in reality not every group contains all the components with a given designation. For example, in the RX600 group there is no rear derailleur and it must be selected from another series.
If you’re at the beginning of your journey with gravel bikes and are still getting lost in the various configurations, we recommend that you try checking out the various available configurations of these groups yourself on Shimano’s website, or take a look at the Shimano GRX component configuration chart below.