The Japanese component giant finally brings cable-free shifting to the gravel masses with the new RX827 1×12-speed system
After years of watching road riders enjoy the clean cockpits and crisp shifting of wireless drivetrains, gravel cyclists can finally cut the cord. SHIMANO’s new GRX RX827 1×12-speed system marks the company’s first foray into fully wireless drop bar components specifically designed for gravel riding, and it’s been worth the wait.
Freedom Without Compromise
The beauty of the RX827 system lies in its universality. Unlike some wireless systems that demand specific frame routing or proprietary mounts, SHIMANO’s approach is refreshingly straightforward—if your bike has a derailleur hanger, you’re good to go. This means you can transform your favorite gravel rig with cutting-edge technology without shopping for a new frame.
At the heart of the system sits the RD-RX827 wireless rear derailleur, which borrows heavily from SHIMANO’s mountain bike DNA. The derailleur features the same robust SHADOW ES technology found on their trail-tested MTB components, with a low-profile wedge design that tucks the mechanism closer to the bike and away from trail hazards.
Built for the Beating
Gravel riding demands equipment that can handle everything from smooth tarmac to chunky singletrack, and the RX827 delivers. The derailleur’s skid plate design and rounded edges help it glance off rocks and roots, while the automatic impact recovery function ensures it bounces back to proper alignment after taking a hit.
The battery, sealed and protected within the derailleur body, promises 700-1,000 kilometers of riding between charges—enough for most multi-day adventures. At 449 grams, the long-cage RX827 SGS isn’t the lightest option on the market, but its durability-focused design justifies the extra weight for serious gravel riders.
Gearing for Adventure
SHIMANO pairs the RX827 with their proven 10-51T MICRO SPLINE cassettes, offering a massive 510% gear range that handles everything from steep climbs to flat road sections. Riders can choose between 40T or 42T chainrings, providing flexibility to match the drivetrain to their preferred riding style and local terrain.
The system maintains compatibility with SHIMANO’s existing 12-speed wireless shifters, including options from their road (DURA-ACE, ULTEGRA, 105) and mountain bike (XTR, DEORE XT) lines. This cross-compatibility opens up interesting possibilities for riders who want to mix and match components or use the same shifters across multiple bikes.
Cockpit Evolution
For riders committed to the 1x setup, SHIMANO introduces the BL-RX825-L brake-only lever. This streamlined option eliminates the shifter mechanism entirely, saving 19.5 grams per lever while maintaining the same ergonomic excellence as the full DUAL CONTROL units. The lever features raised hoods with ribbed surfaces and anti-slip coating—details that matter during long days in the saddle.
Those who prefer the full DUAL CONTROL experience can stick with the ST-RX825 levers, which offer three programmable Di2 buttons plus compatibility with accessory switches. This flexibility allows riders to customize their shifting experience, whether they prefer traditional paddle shifting or want to add buttons on the bar tops for climbing access.
Wheels to Match
Alongside the drivetrain components, SHIMANO introduces the RX180 tubeless aluminum wheelset. While not groundbreaking, these wheels address a real need in the market for reliable, affordable gravel hoops. The 25mm internal rim width accommodates tires from 32mm to 50mm, and the convertible rear hub accepts both MICRO SPLINE and HG freehub bodies.
At 2,105 grams for the pair, the RX180s aren’t featherweight, but they’re positioned as value-oriented workhorses rather than race-day exotica. The hooked tubeless rims and replaceable freehub body design suggest these wheels are built for the long haul.
The Bigger Picture
The RX827 system represents more than just another wireless option—it’s SHIMANO’s statement that gravel deserves purpose-built technology. By combining the reliability of their mountain bike heritage with the refinement of their road components, they’ve created a system that feels at home whether you’re racing cyclocross or bikepacking across continents.
The wireless revolution in cycling has moved beyond mere convenience to become a reliability upgrade. Fewer cables mean fewer things to break, adjust, or replace on the trail. For gravel riders who demand performance without compromise, the GRX RX827 offers a compelling path forward into the cable-free future.
Availability and Pricing
SHIMANO has not yet announced pricing or availability for the GRX RX827 system. Given the positioning between their mountain bike and road wireless offerings, expect pricing to reflect the system’s premium technology and gravel-specific engineering. Check with your local SHIMANO dealer for updates on availability.
