Shimano GRX Di2 825 2x12 Gravel Groupset

If you want the ultimate in gravel-specific performance, the new Shimano GRX Di2 825 2x12 is the upgrade that delivers. With full manufacturer training and extensive hands-on experience fitting GRX Di2, Bike Clinique gives you a flawless install and expert support—so you can focus on your ride, not your setup.

Why Choose GRX Di2 825 at Bike Clinique?
GRX was the world’s first gravel-specific groupset, and the latest Di2 825 brings it right up to date with 12-speed, wireless shifting, and a design tuned for real-world adventure. Enjoy effortless, instant gear changes at the push of a button—no cables, no fuss, just smooth, precise shifting every time. The system is fully customisable via the Shimano E-Tube app, so you can tailor shifting logic, button functions, and even run fully or semi-synchronous modes for a truly dialled cockpit.

What’s Included:

• Shifters/Brakes: GRX Di2 ST-RX825 levers with non-slip, gravel-optimised ergonomics and fully wireless shifting. Paired with flat-mount BR-RX820 calipers for confident, powerful braking in all conditions.

• Rotors: Ultegra RT-CL800 Center Lock, 160mm front and rear, with Ice-Tech cooling for consistent, fade-free stopping on long descents.

• Crankset: GRX FC-RX820-2, 2x12-speed, 48/31T chainrings, available in 170, 172.5, or 175mm. Narrow 151mm Q-factor for comfort and clearance with wide tyres.

• Front Derailleur: GRX Di2 FD-RX825, 2x12, wireless, with auto-trim for silent, perfect shifts every time.

• Rear Derailleur: GRX Di2 RD-RX825 Shadow+, 2x12, wireless, with chain stabilisation for rough terrain and compatibility with 11–34T or 11–36T cassettes.

• Cassette: CS-HG710, 12-speed, 11–36T or 11–34T, Hyperglide+ for seamless, quiet shifting even under load.

• Chain: Deore XT/Ultegra CN-M8100, 12-speed, 126 links, with chain lock and SIL-TEC coating for smooth, long-lasting performance.

• Battery & Charging: BT-DN300 internal battery (hidden in seatpost or steerer), EW-EC300 charging cable, and EW-SD300-I internal E-Tube cabling for a clean, integrated look.

Specs at a Glance:

• 2x12-speed (wireless electronic)

• Crank Lengths: 170, 172.5, 175mm

• Chainring: 48/31T

• Cassette: 11–36T or 11–34T

• Brake: Hydraulic disc, flat mount, 160mm rotors

• Freehub: Shimano Road

• Color: Black, grey, silver

How Does It Ride?
GRX Di2 825 is all about smooth, lightning-fast shifting, silent running, and total confidence on any surface. The ergonomics are tuned for gravel, the gearing is perfect for big climbs and fast flats, and the braking is powerful and consistent—even in the worst conditions. Riders love the customisable controls, the clean cockpit, and the peace of mind that comes with a pro-level install.

Why Trust Bike Clinique?
With full Shimano manufacturer training and real-world experience fitting GRX Di2, you get expert advice, a perfect install, and ongoing support. We’ll check your frame compatibility, talk through gearing and setup options, and give you a clear estimate before any work begins.

Ready to experience the best in gravel performance?
Book a consultation, schedule your upgrade online, or call us on 07951125843. Pop into our Wimbledon workshop for a demo, get honest, jargon-free advice, and let us help you unlock the best of Shimano GRX for your next adventure.