Di2 - The revolutionary DI2 shifting system solves the challenges drivetrains present to the power-delivery equation in cycling. DI2 gives you instant, accurate, lighting-fast shifts the first and every time, at the push of a button. Even in the most extreme conditions, shifting is precise and controlled. You can change gear even under heavy load while climbing or accelerating. With DI2, you are in complete control.
E-Tube - The E-Tube platform's “Plug & play” and D-FLY wireless connections make it easier than ever to check the system's status, and apply customized settings to DI2 and Shimano Steps components with a PC, tablet or smart phone.
Shimano Electronic Intelligent System - A technological innovation of the computerized shifting system based on the DI2 concept with which is called, the SEIS (Shimano Electronic Intelligent System).
The SEIS innovative shift technology is still based on the Shimano Index System (SIS) that has proved its superior gear changing characteristics over the years. The big difference is that in this case, the shifting action is provided for by electronics instead of mechanics.
Shimano Shadow Rd+ - Less distraction quiet drive train. Rear derailleur stabilizer reduces chain slap. Simple solution for chain drop. Lighter and more efficient than roller type chain device.
Adjustable chain stabiliser prevents chain slapping and drops
Switch stabilizer On/Off to match the terrain
Gravel-tuned clutch tension
Silent and uninterrupted rear shifting on rough terrain
Smooth and reliable mixed surface shifting
Compatible with current road Dual Control Lever
Series Shimano: GRX DI2Direct attachment: YesE-tube connector (pcs): 0E-tube port (pcs): 1Firmware update by E-Tube Project: YesFluoric coated link bushings: 4Low sprocket - Max.: 42TLow sprocket - Min.: 40TRear speeds: 11Sealed bearing guide pulley: YesSealed bearing tension pulley: YesTop-Normal Spring Type Shadow Rd+Top sprocket - Max.: 11TTop sprocket - Min.: 11TTotal capacity: 31T