
Shimano RD-RX825 GRX Di2 12-Speed Rear Derailleur
by Shimano
£280.49
GTIN04550170310899
EAN4550170310899
MPNRDRX825
Prices updated 16 Mar 2026
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Product Description
The Shimano RD-RX825 GRX Di2 12-Speed Rear Derailleur offers fast, precise shifting thanks to its advanced Di2 technology. Its low-profile Shadow Plus design ensures smooth, reliable performance even on rough terrain. With wide gear compatibility and rugged construction, it delivers both durability and ease of use for gravel and cyclocross riders.Key Features and Benefits:Low Profile Shadow Plus Design: Reduces risk of derailleur damage during off-road riding. Provides a smooth, uninterrupted ride, even on rough terrain.Di2 Electronic Shifting: Delivers fast, precise gear changes without delay. This ensures optimal performance, making climbs and descents easier.Chain Stabilising Switch: Minimises chain bounce and noise on uneven ground. Improves drivetrain stability, so you can focus on riding, not gear issues.High Tolerance Forged Aluminium Body: Lightweight yet highly durable construction. This results in long-lasting performance and reliable shifting over time.12-Speed Compatibility: Works with 12-speed HG Plus chains for versatile gearing options. Offers a broad range for challenging terrain and elevation changes.Wide Gear Ratio Compatibility: Supports gear ratios up to 11-36T, giving flexibility for varied conditions. Allows for easier climbs and greater control on descents.Optimised for Gravel and Cyclocross: Designed specifically for rugged conditions. Ensures the derailleur withstands the rigours of off-road adventures.E-Tube Di2 Compatibility: Fully compatible with Shimano's E-tube platform for easy system integration. This offers smoother electronic shifting for a streamlined experience.Looking for precise shifting and reliable performance on rough terrain The Shimano GRX Di2 derailleur is built to meet the demands of gravel and cyclocross riders. With advanced Di2 technology and durable construction, it delivers smooth, accurate gear changes in all conditions.Ready to upgrade your drivetrain for better control and efficiency Shimano s GRX Di2 rear derailleur ensures a quieter ride and stable shifting on any terrain, giving you the performance edge you need.Specification:Shimano GRX, with its gravel specific ergonomics, optimised gearing options, rugged reliability, and quiet and stable drivetrain, sets itself apart from the rest of the component worldLow profile Shadow Plus design 12-speed rear derailleur with Di2 technology for fast and precise shifting performanceShadow Plus uses a chain stabilising switch that when on will reduce chain bounce in rough terrain maintaining more stable drive and shiftingHigh tolerance cold forged aluminium link plates and body construction is extremely light and durable12-speed E-tube Di2 compatibleCompatible with 12-speed HG Plus chainsWide gear ratio compatible up to 11-36T
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