Product Details
Shimano GRX 817 Di2 11-Speed Rear Derailleur
The Shimano GRX 817 Di2 11-Speed Rear Derailleur uses a gravel-tuned clutch and adjustable chain stabiliser to deliver a smoother, more reliable experience to your gravel and adventure riding. You can switch the stabiliser on or off depending on the terrain, and the spring force, combined with the friction, keeps the chain tension high so that chain slap and noise are reduced - perfect for broken roads.
With the Shimano E-TUBE platform that supports the electronic gears you can wirelessly customise the settings and shifting synchronisation from a smartphone, even from the roadside, and the resilient all-weather design of the system will keep you riding in all weathers. It is compatible with current road Dual Control Levers, making it a great upgrade if your local roads are in poor condition.
Features
- Adjustable chain stabiliser prevents chain slapping and drops
- Switch stabiliser ON/OFF to match the terrain
- Gravel-tuned clutch tension
- Silent and uninterrupted rear shifting on rough terrain
- Smooth and reliable mixed surface shifting
- Compatible with current road Dual Control Levers
- Compatible with 11-speed cassette
- Top sprocket: Maximum 11T / minimum 11T
- Low sprocket: Maximum 42T / minimum 40T
- Total capacity: 31T
- Shimano E-TUBE connectivity for customisation
Specifications
- Discipline Compatibility
- Road, Gravel
- Family
- GRX
- Intended Use
- Performance
- Max Tooth Capacity
- 42
- RD [Maker]
- Shimano
- RD [Model]
- GRX 817 Di2
- Speed Compatibility
- 11-speed
- Product code
- 1051720 / 54308166926682
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Shipping & Returns
Free UK delivery on orders over £50. Orders are dispatched within 1-2 working days and typically arrive 1-2 working days later.
Return unused items in their original packaging within 30 days of delivery. Return postage is £3.50.
Q & A
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About Shimano
Shifting the way the world rides.
From a single Osaka workshop in 1921, Shimano has grown into the world's most influential component maker. The brand's relentless engineering — Dura-Ace, Ultegra, GRX, XTR — has shaped the way the world shifts, brakes and rides, on the road and off it.
Shimano's flagship groupset, Dura-Ace, has been the benchmark for top-level road components for more than five decades. Every refinement that lands on Dura-Ace eventually shapes the entire Shimano range, all the way down to entry-level drivetrains.