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Ships within 48 hours · Estimated delivery Jul 23 - Jul 28
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Description
GRX Di2 RD-RX815GRX Di2 11 speed rear derailleur for double cranks Adjustable chain stabilizer prevents chain slapping and drops Gravel tuned clutch tension can be toggled ON OFF to match the terrain Maximum front difference: 17T Total capacity: 40T Low sprocket: Max. 34T Min. 30T Top sprocket: 11T Attributes Cage GS Max Front Difference 17T Maximum Cog 34T Minimum Cog 11T Primary Color Grey RD Capacity 40T RD Spring Type Shadow Plus RD Weight 287g Speed 11
- GRX Di2 11 speed rear derailleur for double cranks
- Adjustable chain stabilizer prevents chain slapping and drops
- Gravel-tuned clutch tension can be toggled ON/OFF to match the terrain
- Maximum front difference: 17T
- Total capacity: 40T
- Low sprocket: Max. 34T/Min. 30T
- Top sprocket: 11T
Attributes
| Cage | GS |
| Max Front Difference | 17T |
| Maximum Cog | 34T |
| Minimum Cog | 11T |
| Primary Color | Grey |
| RD Capacity | 40T |
| RD Spring Type | Shadow Plus |
| RD Weight | 287g |
| Speed | 11 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 19 reviews
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Product Reviews
★★★★★ 5
EUFY 11S
Size: 2+8 pack
Used to replace the ones for my EUFY 11S vacuum. They fit just like the ones and got my vacuum back to cleaning really good. Didn’t realize how loud my vacuum had become until I replaced these parts.
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Reviewed in the United States on December 19, 2025
★★★★★ 5
Get this!
Size: 3+12+12+2+1 pack
Very nice pack of essentials for my robot.
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Reviewed in the United States on March 17, 2026
★★★★★ 5
Side brush screw PSA 🤪
Size: Eufy B-18Packs
Reviewing parts for Eufy L60
Review posted for some PSA
When you get the brush replacement this kit comes with a tiny screw driver DO NOT USE THAT TINY SCREWDRIVER TO UNDO YOUR SIDE BRUSH IT WILL STRIP THE OEM SCREW AND MAKE IT USELESS.
the screw driver included fits the screws that are about 2 mil wide the side brush screw is different. Grab a regular screw driver to undo a side brush.
The main rolling brush cover is different but the rubber part still hits the floor at proper height so I don’t see a big issue there.
When replacing the filter the filter cover was a little snug but I don’t see a big problem there just be aware to close the cover all the way but be careful not to push too hard so the plastic clips don’t break on the cover.
Don’t forget to wipe down all the seals when installing the filter to maintain the seal integrity to keep the suction at top intensity.
The dust bags seemed to be cut out with a stencil which gave the cardboard a better appearance than the oem cut out dust bags so that was interesting, dimensions were identical when comparing so I don’t anticipate any issues!
Over all I’m glad we have cheaper alternative replacement parts that can be used so thank you! ❤️
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Reviewed in the United States on January 30, 2025
★★★★★ 5
Great parts replacement kit for Eufy!
Size: Eufy B-18Packs, Size: Eufy B-18Packs
This kit has made it nice keeping up with our Eufy robot vacuum. All parts were free of defect and fit as it should. Instead of replacing individual piece by piece, I now just change all of the replacement parts at one time and it’s good to go for a while! Great value. Great quality. Will definitely be buying this kit again!
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Reviewed in the United States on April 7, 2026
★★★★★ 5
Replacement quality is outstanding
Size: Eufy A-21Packs
Great value. Plug and play. Worked as designed
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Reviewed in the United States on May 25, 2026
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