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Be the first to share your experience with the Shimano GRX RX820 Mechanical 1x12 Disc Groupset — help other riders decide!
Specifications
Attributes
Brake TypeHydraulic Disc
Shift TypeMechanical
Speeds12
Speeds—
Chainrings1x
Cassette Range10-51T
Max Rear Cog51
Has Front DerailleurNo
Crank Spindle TypeShimano 24mm (Hollowtech II)
Freehub TypeShimano MicroSpline
RD Max Capacity51
Included Components
Shimano GRX RX820 Mechanical 1x12 Disc Groupset
Groupset2,720g
FC-RX820-1 Crankset (40T, 172.5mm)
Crankset648g
RD-RX822-SGS Rear Derailleur (Long Cage)
Derailleur (Rear)288g
CS-M8100 Cassette (10-51T)
Cassette473g
CN-M8100 Chain (126 links)
Chain281g
BR-RX820 Disc Brake Caliper (Front)
Front Brake146g
BR-RX820 Disc Brake Caliper (Rear)
Rear Brake136g
ST-RX820 Shifter/Brake Lever (Right)
Shifters296g
ST-RX820-LA Brake Lever (Left)
Brake Levers274g
RT-CL800 Disc Rotor (160mm)
Other Accessories109g×2
Total Weight5,480g
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