Shimano GRX Di2 RD-RX815 11 Speed Rear Derailleur
The Shimano GRX RDRX815 11V rear derailleur is an essential component for passionate cyclists who love the road, combining performance, lightness, and durability. Specifically designed to meet the demands of modern cyclists, this derailleur offers cuttingedge technology that enhances shifting efficiency, ensuring a smooth and enjoyable ride. Made from aluminum, this derailleur combines robustness and lightness, making it ideal for longer tours where every gram counts. The long cage allows for handling high gear ratios while providing better compatibility with a wide range of cassettes, facilitating the tackling of steep climbs and sprints on flat terrain. Shimano's Di2 system ensures unparalleled precision in gear shifting. Thanks to the electronics, the derailleur's responsiveness is optimized, allowing for instant and effortless gear changes. This level of efficiency is particularly appreciated on long rides, where every second matters. With the Shimano GRX RDRX815, performance and reliability are guaranteed. This rear derailleur is designed for cyclists who seek not only advanced technical features but also a design that stands the test of time. Whether for competitions or leisure rides, this accessory meets the needs of ambitious cyclists. In summary, the Shimano GRX RDRX815 11V rear derailleur is an indispensable choice for any cycling enthusiast looking to upgrade their gear. Enjoy an exceptional riding experience and transform your tours with a derailleur made for adventure.
The Shimano GRX RDRX815 11V rear derailleur is an essential component for passionate cyclists who love the road, combining performance, lightness, and durability. Specifically designed to meet the demands of modern cyclists, this derailleur offers cuttingedge technology that enhances shifting efficiency, ensuring a smooth and enjoyable ride. Made from aluminum, this derailleur combines robustness and lightness, making it ideal for longer tours where every gram counts. The long cage allows for handling high gear ratios while providing better compatibility with a wide range of cassettes, facilitating the tackling of steep climbs and sprints on flat terrain. Shimano's Di2 system ensures unparalleled precision in gear shifting. Thanks to the electronics, the derailleur's responsiveness is optimized, allowing for instant and effortless gear changes. This level of efficiency is particularly appreciated on long rides, where every second matters. With the Shimano GRX RDRX815, performance and reliability are guaranteed. This rear derailleur is designed for cyclists who seek not only advanced technical features but also a design that stands the test of time. Whether for competitions or leisure rides, this accessory meets the needs of ambitious cyclists. In summary, the Shimano GRX RDRX815 11V rear derailleur is an indispensable choice for any cycling enthusiast looking to upgrade their gear. Enjoy an exceptional riding experience and transform your tours with a derailleur made for adventure.
The Shimano GRX RDRX815 11V rear derailleur is an essential component for passionate cyclists who love the road, combining performance, lightness, and durability. Specifically designed to meet the demands of modern cyclists, this derailleur offers cuttingedge technology that enhances shifting efficiency, ensuring a smooth and enjoyable ride. Made from aluminum, this derailleur combines robustness and lightness, making it ideal for longer tours where every gram counts. The long cage allows for handling high gear ratios while providing better compatibility with a wide range of cassettes, facilitating the tackling of steep climbs and sprints on flat terrain. Shimano's Di2 system ensures unparalleled precision in gear shifting. Thanks to the electronics, the derailleur's responsiveness is optimized, allowing for instant and effortless gear changes. This level of efficiency is particularly appreciated on long rides, where every second matters. With the Shimano GRX RDRX815, performance and reliability are guaranteed. This rear derailleur is designed for cyclists who seek not only advanced technical features but also a design that stands the test of time. Whether for competitions or leisure rides, this accessory meets the needs of ambitious cyclists. In summary, the Shimano GRX RDRX815 11V rear derailleur is an indispensable choice for any cycling enthusiast looking to upgrade their gear. Enjoy an exceptional riding experience and transform your tours with a derailleur made for adventure.
The Shimano GRX RDRX815 11V rear derailleur is an essential component for passionate cyclists who love the road, combining performance, lightness, and durability. Specifically designed to meet the demands of modern cyclists, this derailleur offers cuttingedge technology that enhances shifting efficiency, ensuring a smooth and enjoyable ride. Made from aluminum, this derailleur combines robustness and lightness, making it ideal for longer tours where every gram counts. The long cage allows for handling high gear ratios while providing better compatibility with a wide range of cassettes, facilitating the tackling of steep climbs and sprints on flat terrain. Shimano's Di2 system ensures unparalleled precision in gear shifting. Thanks to the electronics, the derailleur's responsiveness is optimized, allowing for instant and effortless gear changes. This level of efficiency is particularly appreciated on long rides, where every second matters. With the Shimano GRX RDRX815, performance and reliability are guaranteed. This rear derailleur is designed for cyclists who seek not only advanced technical features but also a design that stands the test of time. Whether for competitions or leisure rides, this accessory meets the needs of ambitious cyclists. In summary, the Shimano GRX RDRX815 11V rear derailleur is an indispensable choice for any cycling enthusiast looking to upgrade their gear. Enjoy an exceptional riding experience and transform your tours with a derailleur made for adventure.
in 11 offers
The lowest price for Shimano GRX Di2 RD-RX815 11 Speed Rear Derailleur right now is $254.08 at Merlin Cycles, compared across 11 retailers.
The all-time low was $254.08 on 30 Aug 2025. That's the lowest price we've ever tracked — a great time to buy.
Prices last updated 9 June 2026.
Last updated at 09/06/2026 20:48:26
Shimano GRX RD-RX815 GRX Di2, 11-Speed Rear derailleur, Shadow+, for Double, Black
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Shimano GRX RX815 Di2 Rear Derailleur - 11 Speed - Black / 11 Speed
Delivery $45.37
Shimano RD-RX815 REAR DERAILLUER GRX Di2 11-SPEED for 34T MAX MED CAGE SHADOW+
Shimano GRX RX815 Di2 11sp Rear Derailleur
Shimano GRX RD-RX815 2x11S rear derailleur Cage Long
Next-day delivery $40.62
Shimano GRX Di2 Rear Derailleur (RD-RX815)
Free delivery between Fri – Tue
Shimano GRX RD-RX815-R Di2 11-Speed for 34T Max Shadow+ Rear Derailleur
Free delivery between Thu – Tue
Shimano GRX RD-RX815-R Di2 11-Speed for 34T Max Shadow+ Rear Derailleur
Free delivery between Thu – Tue
Shimano Rear Derailleur GRX Di2 RD-RX815 2x11 Speed
Free delivery
GRX DI2 RD-RX815 REAR DERAILLUER 34T 11 SPEED (ULTEGRA 11 SP DI2 COMPATIBLE)
Delivery $10
originally posted on bikeinn.com
Fast shipping and response. Item arrive before expecting time with neat packaging
originally posted on jensonusa.com
The RX-815 rear derraileur does great shifting, allows for larger 40 + cogset , ideal for conquering any mountain on a hilly century ride, no matter the terrain weather paved or gravel, the RX 815 does the job.I've taken it to do a couple of century rides in Colombia where no matter where you are you are always going up.
originally posted on bikeinn.com
Excellent rear mech, specifically for 1 x set-ups. Use the 815 if you are going 2x. Usual Shimano quality. I had the cable actuated version previously, which worked fine, but did need regular checking and re-cabling every few thousand Km’s. This one shifts cleanly and precisely every time - I have it configured right lever down left lever up, plus hood buttons linked to head unit. The E-tube app has improved since the last update. Expensive, when you look at the cable prices particularly, but apart from that a joy to use!
| Frame material | Aluminium |
| Length | 15 centimetres |
| Number of speeds | 11 |
| Sport | Cycling |
| Included Components | Shimano GRX |
Shimano GRX RD-RX815 GRX Di2, 11-Speed Rear derailleur, Shadow+, for Double, Black
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Shimano GRX RX815 Di2 Rear Derailleur - 11 Speed - Black / 11 Speed
Delivery $45.37
Shimano RD-RX815 REAR DERAILLUER GRX Di2 11-SPEED for 34T MAX MED CAGE SHADOW+
Shimano GRX RX815 Di2 11sp Rear Derailleur
Shimano GRX RD-RX815 2x11S rear derailleur Cage Long
Next-day delivery $40.62
Fast shipping and response. Item arrive before expecting time with neat packaging
The RX-815 rear derraileur does great shifting, allows for larger 40 + cogset , ideal for conquering any mountain on a hilly century ride, no matter the terrain weather paved or gravel, the RX 815 does the job.I've taken it to do a couple of century rides in Colombia where no matter where you are you are always going up.
Excellent rear mech, specifically for 1 x set-ups. Use the 815 if you are going 2x. Usual Shimano quality. I had the cable actuated version previously, which worked fine, but did need regular checking and re-cabling every few thousand Km’s. This one shifts cleanly and precisely every time - I have it configured right lever down left lever up, plus hood buttons linked to head unit. The E-tube app has improved since the last update. Expensive, when you look at the cable prices particularly, but apart from that a joy to use!
GRX DI2 1X groupset is the best for gravel bikes!
I guess the best thing about Bikeinn is they have stock and prices are fair.
Awesome reliable product. Item shipped out very quickly and arrived perfectly without any drama.
| Frame material | Aluminium |
| Length | 15 centimetres |
| Number of speeds | 11 |
| Sport | Cycling |
| Included Components | Shimano GRX |
