The Shimano GRX Di2 groupset is Shimano's new 2x12-speed electronic groupset for gravel bikes, a combination of Shimano's unparalleled electronic shifting technology and a wide range of gear ratios. Shimano developed each component with the specific needs of cyclists in mind.

• ST-RX825 Di2 2x12-speed brake/shift controls.
  
• GRX BR-RX820 Flat mount calipers.
  
• GRX FC-RX8202 48/31D crankset, 172.5 mm.
  
• FD-RX825 Di2 front derailleur, direct mount, 2x12 speeds.
  
• RD-RX825 Di2 12v rear derailleur.
  
• Ultegra CS-R8100 11-34D sprocket cassette.
  
• CN-M8100 chain, 126 links (locking Quick Link included).
  
• RT-MT800 discs (Centerlock, 160 mm diameter).
  
• Shimano BT-DN300 Di2 battery for mounting in the seatpost.
  
• Shimano EW-EC300 USB type A charging cable (cable length 1500mm).
  
• Shimano Di2 EW-SD300-I 600mm internal power cable.
  
• Shimano Di2 EW-SD300-I 1200mm internal power cable.
  
• Shimano RT-CL800 Center-Lock 160mm brake disc including locking ring.