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Shimano Gravel
- RX820/610 series: 12-speed shifting with two single chainring and two double chainring options with mechanical and Di2 variants
- RX810 series: 11-speed Ultegra level (R8000 series equivalent) with mechanical and Di2 variants
- RX600 series: 11-speed 105 level
- RX400 series: 10-speed Tiagra level
Shimano GRX
- Cassette: 10-, 11- or 12-speed
- Largest sprocket: 51t
- Shifting: Mechanical/electronic
- Brakes: Hydraulic disc only
The GRX groupset’s rear derailleurs are also unique in accommodating very wide cassettes up to a maximum 11-51 for the 1×12-speed variant, although only up to 42 teeth for 1×11-speed.
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