Shimano GRX RX825 DI2 2x12 Speed Groupset

Electrifying Shimano's 12-speed gravel component family, the new 2x12-speed GRX RX825 Di2 components combine Shimano's unrivaled electronic shifting with optimized gearing options for riding, racing, and all-day adventures. Meet the new 12-speed SHIMANO GRX Di2 RX825 series, which includes dual control levers refined for comfort and control, a Shimano Shadow RD+ equipped rear derailleur for better chain management, and a gravel-optimized front derailleur for precise shifting. Go for legendary precision. Customize your ride with the E-TUBE PROJECT Cyclist app. Choose your shift speed, assign shift buttons to perform specific functions, and program shift modes like Synchronized and Semi-Synchronized shifts—to keep your attention fully on the gravel ahead.

Shimano GRX RX825 DI2 2x12 Speed Groupset delivers a wide gear range with tight gear steps so you can spin a comfortable cadence whether hammering at the front of a racing pack, spinning solo down a quiet country lane, enjoying endless dirt road rollers, or tackling a precipitously steep backcountry climb. Shimano’s new GRX Di2 is wired where it makes sense, featuring a central, multi-port battery that supplies stable, long-lasting power to both front and rear derailleurs. Smaller diameter wires connect directly from the battery to each derailleur, eliminating the need for junctions and streamlining the build process. The central internal battery also simplifies charging and remains secure over the roughest roads, trails, or whatever less traveled path you choose.

Shimano GRX RX825 DI2 2x12 Speed Groupset features a wireless gravel-specific cockpit where raised hoods with ribbed surface texture and anti-slip brake levers provide ultimate hand security no matter how spicy your ride gets. That secure hand position is further enhanced, as it was with the original GRX RX815 Di2 shifters, with the location of the third Di2 button on the inside of the hood. Whether used as another shift location or for scrolling the screen on your GPS device so you don’t miss the next turn in your adventure, this third button is another way to fully experience Shimano’s electronic Di2 system.

Shimano GRX RX825 DI2 2x12 Speed Groupset new Di2 system also allows for accessory shift buttons, another key advantage of electronic shifting. Plugging in one of Shimano’s satellite switches, whether on the tops, drops, or on aero bars, riders can more consistently maintain their effort without the need to move their hands. Like the third button on the GRX Di2 dual-control levers, these satellite switches can be assigned various functions including shifting of either derailleur, to control compatible lights and GPS devices, or as a lap button during workouts. The new dual control levers also employ a gravel-optimized body shape cross-section for seamless integration with flared handlebars. Rounder in shape, the transfer from handlebar to hood is smoother and creates a larger surface area to help eliminate pressure points. With enhanced comfort, you can extend your day out a little longer.