GRX RX825 2x12 Di2 GroupsetSHIMANO GRX Di2 825 groupset 2x12 crank 170 mm cassette 11 36 With the GRX, Shimano launched the first gravel specific groupset on the market. Since then, the range of applications and the range of gravel bikes has expanded significantly. Shimano has responded to this development by updating the GRX groupset. It now comes with modern Di2 technology and a 12 speed drivetrain. The high level of functionality and quality reflects the Japanese company's