Electronic shifting on a gravel bike means one less thing to worry about when you're bouncing over washboard roads or grinding up loose climbs. The Shimano GRX Di2 2x 11-Speed Kit bundles the core drivetrain and braking components you need for a wired e-Tube build, including items that can be difficult to source individually. This is a partial kit, so you'll still need a crankset, bottom bracket, disc rotors, Di2 wiring, and a Junction A box to complete the build.

The kit includes ST-RX815 dual control levers with BR-RX810 hydraulic disc calipers for both sides. GRX lever hoods feature gravel-specific ergonomics with raised heads that prevent hand slippage on rough terrain, plus textured surfaces on the brake levers themselves. Both levers have Di2 shift capability, which you can customize through Shimano's e-Tube app to assign shift functions however you prefer. The hydraulic system uses ServoWave action for a faster initial bite point followed by a wider modulation range, and the flat mount calipers come with IceTech finned pads.

Front and rear derailleurs are the RD-RX815 units designed specifically for 2x drivetrains. The rear derailleur uses Shimano's Shadow RD+ design with an adjustable clutch tensioner tuned for gravel conditions, keeping chain slap and dropped chains to a minimum when the terrain gets rough. The front derailleur handles up to a 17-tooth chainring difference and includes programmed trim settings. Both derailleurs work with Shimano's Synchronized Shift modes if you want to automate front shifting.... Read More