GRX RX825 Di2 Groupset
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The Shimano GRX RX825 Di2 brings the precision of electronic shifting to a versatile 2x12-speed setup for gravel cyclists. This system uses a smart semi-wireless configuration: the shifters communicate wirelessly with the rear derailleur, while the derailleurs are connected via cables to a central battery for maximum reliability and long battery life. This ensures a clean cockpit without compromising shifting speed. Whether you're climbing or sprinting, shifting is direct and smooth, even under heavy load, thanks to Hyperglide+ technology.
The ergonomics of the shifters are specifically designed for unpaved terrain. The grips have a textured surface for extra grip and a shape that perfectly matches flared handlebars, reducing pressure on the hands. The hydraulic disc brakes are equipped with Shimano's Servo Wave technology, which allows the brake pads to engage faster, giving you more control on technical descents. The buttons can be fully customized via the E-TUBE app, including the convenient "Front Shift Next" option to operate the front derailleur with a single button.
With the 2x12 drivetrain, you benefit from small steps between gears for optimal cadence and a wide range for steep climbs. The rear derailleur features the integrated Shadow RD+ chain stabilizer, which prevents chain slap and keeps the drivetrain quiet on rough trails. The combination of robust durability and refined electronics makes the RX825 the ideal choice for enthusiastic gravel riders who demand top performance in all conditions.
This is an OEM product
With OEM products you get original top quality, but without unnecessary retail packaging. The focus is purely on the part itself, allowing you to benefit from the exact same top performance at a competitive price.
Read more about OEMSpecifications
| Number of gears | 12 |
| Cassette | 11-34T or 11-36T (HG Spline) |
| Crank length | 170mm/172.5mm |
| Chain | Shimano Shadow RD+ (on/off switchable) |
| Size | 170mm, 172.5mm |
| Shifters | 2x CR1632 (coin cell) |
| Gear ratio | 11/34T |
| Technology | SERVO WAVE Action |
| Type | Electronic (Di2) 2x12-speed |
| Brake type | Centerlock |
| SKU | GRRX825CX811 |
| Barcode | 1000000131673 |
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Our Reviews
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Once again a good experience. Ordered a Sram Code RS brake set. Delivered quickly, unfortunately the handlebar clamps were forgotten but delivered without issues afterwards. Also the MMX.
JoostUpdated on Apr 14, 2026 -
Bought a cool Hollowgram R-SL50 wheelset for my gravel bike from Woest Sport at a great price. The rear wheel needed to be re-spoked according to the Cannondale Ai principle, which they did very profes...
HansUpdated on Oct 5, 2025 -
Today, after some Googling, I went to Woest for new running shoes. I've been running in Asics Nimbus for over 20 years, and now, after a tip from a colleague, I decided to try Hoka. I was perfectly helped by the staff.....
HenkUpdated on 16 Mar 2023
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