The GRX Di2 is Shimano's new electronic 2x12-speed groupset for gravel bikes, a combination of Shimano's unrivaled electronic shifting technology and a wide range of gear ratios. Shimano has developed every single component taking into account the specific needs of cyclists.

Version with 2x12 chainrings 48-31 teeth, 172.5 mm cranks and Ultegra 11-34 sprocket cassette.

< p> - 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 speed
- RD-RX825 Di2 12v rear derailleur
- Ultegra CS-R8100 11-34T sprocket cassette
- CN-M8100 chain, 126 links (Quick Link lock included)
- RT-MT800 discs (Centerlock, diameter 160 mm)
- Shimano BT-DN300 Di2 battery for mounting in the seat post
- Shimano EW-EC300 USB charging cable type A (cable length 1500mm)
- Shimano Di2 internal power cable EW-SD300-I 600mm
- Shimano Di2 internal power cable EW-SD300-I 1200mm
- Shimano RT-CL800 Center-Lock brake disc 160mm incl. locking ring