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Shimano GRX RD-RX810 Shadow RD+ Direct Rear Derailleur

33 Reviews | 6 Questions

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Product description Shimano GRX RD-RX810 Shadow RD+ Direct Rear Derailleur

Feature:

- Adjustable Chain Stabilizer Prevents Chain Slapping And Drops
- Toggle Clutch On/Off To Match The Terrain
- Switch Stabilizer On/Off To Match The Terrain
- Gravel-Tuned Clutch Tension

Benefit:

- Silent And Uninterrupted Rear Shifting On Rough Terrain
- Low Sprocket: Max. 34t/Min. 30t
- Total Capacity: 40t
- Smooth And Reliable Mixed Surface Shifting
- Compatible With Current Road Dual Control Lever
- Maximum Front Difference: 17t
- Top Sprocket: Max. 11t/Min. 11t

Specifications:

- Series: Shimano Grx 11-Speed
- B-Axle_Hollow Axle: Yes
- Cable Adjuster: Yes
- Compatible Chain: Hg-Ev 11-Speed/Hg-X11
- Direct Attachment (Conventional): Yes
- Fluoric Coated Link Bushings: 4
- Low Sprocket_Max.: 34t
- Low Sprocket_Min.: 30t
- Max. Front Difference: 17t
- Pulley_G Pulley Bearing: Yes
- Pulley_Sunken Type Pulley Bolt: Yes
- Pulley_Teeth: 13t
- Pulley_T Pulley Bearing: Yes
- Rear Speeds: 11
- Top-Normal Spring Type: Shimano Shadow Rd+
- Top Sprocket_Max.: 11t
- Top Sprocket_Min.: 11t
- Total Capacity: 40t

Technologies:

- Sis_Shimano_Index_System

Shimano Shadow Rd+:

- Less Distraction Quiet Drive Train
- Rear Derailleur Stabilizer Reduces Chain Slap
- Simple Solution For Chain Drop
- Lighter And More Efficient Than Roller Type Chain Device

Do you like Shimano GRX RD-RX810 Shadow RD+ Direct Rear Derailleur? Enter in our bike section and discover a big variety of Bike parts products and accessories that can help you realize your leisure activities. We verify that the bike products are in a perfect condition. Do not look any further! Our collection of Bike parts are available in different colours and styles.

Features Shimano GRX RD-RX810 Shadow RD+ Direct Rear Derailleur

Color

Black

Electronic

Box Size

Long

Recommended Use

Gravel cycling

Customer reviews of this product (33)

Technical questions about this product (6)

Write a review about this product and earn CoINNs

4.97 / 5

33 Reviews

5 stars

97%

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Shimano GRX RD-RX810 Shadow RD+ Direct Rear Derailleur

RD RX 810 2X 11 SPEED

Piotr - 21/02/2023

100% original rear derailleur shimano grx rd rx810 2x 11 speed, I am very happy with this purchase, everything is great, highly recommended

Grx rd 810

bart - 06/12/2022

The derailleur in the box, everything is fine.

Great product and service

Grant - 10/11/2022

Great product and service, recieved and working as it should!

Perfect

Matt - 09/09/2022

Perfect , great price and arrived fast to australia , great place to shop

Excellent

zeraling - 08/09/2022

Good price, normal shipping to be outside the EU, excellent product in original box. Installed are problems

Shimano grx rd-rx810

Denis - 01/09/2022

Boxed version, great price.

Shimano grx rd-rx 812

serge - 28/07/2022

Delivery on time. In its original shimano box, awaiting assembly

Very good product

elmer - 02/05/2022

very good quality and great shifting

Shimano grx rd-rx812

EDUARD - 02/02/2022

Great price, package arrived in 10 days. Packed in a hard carton box. The switch itself was in the original box.

Shimano RD-RX810

Alexander - 26/11/2021

Box version with short cable and long tongue cover cap

Recommend!!!

Евгений - 21/11/2021

The switch came to Russia in 10 days! Well packaged, everything is great. The price is one of the best on the market. The switch is fairly light.

Shimano = guarantee

Guglielmo - 19/05/2021

Beautiful and precise shifting, shimano is always a guarantee

Shimano GRX

VinzP - 29/01/2021

Nice price, fast delivery, satisfied with this product monted on a gravel bike

Review

Per Lykke Nielsen - 04/01/2021

Super trade. Fast and at a good price.

Great shifting

John - 04/01/2021

Fast delivery and the derailleur shifts like a maniac...

Great.

Arjen - 29/12/2020

Fast delivery!! Product is great.

Super fast delivery

Michael - 28/12/2020

Great shop, great fast delivery! Better is possible!

RD GRX Shadow Plus 812

Rendy - 24/12/2020

I am very happy to get this item, in my country it is very difficult to get it, even if there is a very high price,

Shimano grx

luca - 14/12/2020

Excellent gearbox, used on cross bikes, precise in shifting, works well even in sections with many jumps, fast shipping

Delivery

Cédric Pire - 26/11/2020

Fast and respected delivery time

Precise

Justo - 23/09/2020

Accurate, robust and elegant.

Topppp

sasha - 20/09/2020

After tiagra, it seems like a heavenly switch.

The best diversion ever made by shimano

Ricardo Batista - 10/09/2020

super smooth and precise to the touch !!

Excellent product

Camilo - 06/09/2020

I just installed this derailleur on my gravel bike using Tiagra 4700 10s levers and it works like a charm. Shipping was fast and smooth. C.

Grx-812 shadow plus 11s / 11-42

Xavier Fernandez - 25/08/2020

At the beginning of the year I upgraded my gravel's brakes and drivetrain to Shimano GRX, it came from SRAM Apex single chainring. They installed a GRX-810 derailleur at the store, but lately I was having trouble engaging 11-42. By switching to GRX-812, this problem has disappeared. Very happy with the update.

GRX RD810

Kenneth j - 04/08/2020

Great item just arrive today then i swap it to my tiagra derailer works perfectly

Shimano grx great

Manuel - 30/07/2020

It has very good ponta and it seems that it works great and to put the 40 pinion gear on it is what I needed

Good !!

Uepob - 07/06/2020

Nice RD But the box is not clean...

Great !!!!

Aritz - 25/04/2020

A very fine change, great quality.

GRX - Another Quality Product from Shimano

Michael Morris - 28/02/2020

Have Shimano on all my bikes. Decided to go with the new GRX on my gravel bike. Not a lot different than an XT derailleur. I am running the 2x10 GRX crankset with the GRX 2x11 front and rear derailleur and everything is working fine. I am also running a 42t rear XT cassette with no issues. Not sure I could run a bigger cassette unless I got a longer b screw. As it is now I have about 5 or 6 mm between the 43t cog and the derailleur jockey.

Shimano grx

Candido - 10/11/2019

Shimano has hit the spot again. Perfect in operation. And compatible with road handles. With an enviable finish and details like putting the fine adjustment screws with Allen head and of the same size.

GRX RD

albert sanoy - 03/11/2019

Nice product from shimano. Delivered the products as expected!

GRX - RD for the double crankset

RayG - 10/10/2019

got this as part of my grx drive train upgrade on my gravel bike. i have the grx double crankset and the 32t option is the one you would need. it's the rd810. with the clutch! i did consider getting the rd800 but on shimano's site it lists the 800 compatible with the single ring set up. in case i went down that route. but it's shift geometry would be different as it supports a 42t low gear. i stuck with what shimano lists on their site for my 2x 11sp set up on my gravel bike. i was used to the 2x 105 setup that i currently have and prefer the ability to find a gear i can spin in. i have tried 1x and like the the simplicity. i have that on my mtb. but for road/off-road less technical terrain a 2x gives me more flexibility. also chain line is less severe with the 2x. a 30-32 gear will be better than a 42-42 on the single having ,a 46-11 high gear will be good for my riding capability. it came in all original shimano grx packaging.

Shimano GRX RD RX-810 11V

Manuel Fernandez - 15/10/2023

Good afternoon, I have a Focus Atlas 8.8 with a double chainring and a GRX RD-810 11sp rear derailleur with a 105 R7000 cassette between 11 and 34 teeth. I would like to know if I can change the 34T sprocket and install a 36T one. Thank you

Answer of Euro

It works anyway. Once assembled, adjust the B screw well. I have it working on a 40T but I changed the dropout. It´s a solid gearbox, if you adjust it well it won´t give you problems

Compatibility with Ultegra 6800 gearbox - part 2

Sergio - 21/11/2022

First of all thanks to Wing Fai for answering my previous question. I understand that the decision to integrate the GRX is compatible with the levers, front derailleur and crankset of my current bike, equipped with the ULTEGRA 6800 system. Correct? And in this case, would it make sense to update the rear sprocket set as well, replacing one, still with 11 speeds, with a more versatile one, i.e. with a greater excursion between the minimum and maximum speeds, or with different teeth?

Answer of Jorrit

Compared to the r8000 gs derailleur, the GRX 810 is able to handle a larger cassette 11-36 is possible. The r8000 can go up to 11-34. The GRX derailleur I believe is with a minimum cassette of 11-28. The biggest advantage of the GRX derailleur is that it has a clutch. This allows the chain to chatter less on difficult terrain. This improves shifting performance. The ultegra 6800 rear derailleur is capable of shifting up to an 11-32. When it comes to the go variant. By choosing a GRX 810 derailleur, you can therefore mount an 11-34 or 11-36 and also take advantage of the clutch on difficult terrain

Compatibility with Ultegra 6800 gearbox

Sergio - 19/11/2022

Greetings! I have a Specialized Diverge bike fitted with an ULTEGRA 6800. I do a lot of off roading and they recommended swapping the rear derailleur for a GRX 810. Can I do this, without swapping the front derailleur and shifters? It´s compatible? Thank you

Answer of Albano

There is NO compatibility problem, it only has to coincide in the number of speeds, which are both 11 v. (lever and gear), you also have to check that the GRX model to choose fits your big sprocket. I made the change and it worked the first time,

Answer of Wing Fai

Hi, according to Shimano, GRX RD-RX810 11-speed rear derailleur has a total capacity of up to 40T. Your existing Ultegra double chain-rings are 48T/32T, i.e. a difference of 16T. Your current Ultegra 11-32T cassette has a difference of 21T. The total capacity of your current drive-train is 37T that is within the design of the RD-RX810. On the other hand, RD-RX-810 can work with 11T top sprocket and 34T lowest sprocket (but not less than 30T) of a cassette. Your current cassette is 11-32T that is well within the limit of RD-RX810. What I can see the benefit of using GRX RD-RX810 in your case is its clutch system that can maintain the tension of your chain better. Before the introduction of GRX by Shimano, you may like to know that an old model of Ultegra RD-RX8000-GS also has chain stablilizer. My former Specialized Roubaix Comp-Sagan Collection Underexposed Edition was having ,such version of RD on the bike.

'rd-rx810' or 'rd-rx812'?

Anser - 17/07/2022

Hello, I am building a GRX 2x11 groupset with FC-RX810-2 crankset and am therefore looking for a GRX RD-RX810 rear derailleur. I did not understand if selecting the number of teeth, ´´max32, max42 ", you can then choose between the RD-RX810 model for double (which would have 34 teeth as a maximum and not 32) or the RD-RX812 for single. words by selecting max 32t gray do you buy a RD-RX810?

Answer of Agustín

Yes that´s how it is. If what you want is to mount a 34, the RX810 will serve you.

Rx810

Van - 05/07/2022

Hi, is this also the rx810? The one with 34t max? The 42t max ia rx812 right? I need rx810 for 2x setup

Answer of Bradley

The difference between the 42t model and the 34t model would be that the 42t is the long cage model and the 34t is the short cage model. I have the RD-RX812 in the long cage 42t for a 1x setup.

Answer of Wing Fai

The choice between RX810 and RX812 is a 2X or 1X setup. These two RD have their own set of specifications that cannot be mixed. RX810 can accept up to a difference of 17T for GRX front chainring setup (i.e. 2X). The lowest cog can take up to 34T (max) or at least a 30T. The Total Capacity (i.e. the differences of the front chainrings plus the difference of the rear sprockets) is bigger than R7000/8000/9000 RDs. On the other hand, RX812 is designed for single front chainring setup (1X). It can accept up to a max cog size of 42T for the cassette or at least 40T for the lowest cog .

Compatibility

Rogério Chagas Coelho - 01/07/2020

Good Morning. I would like to know if this exchange is compatible with a candle holder Praxis Alba 2x 48/32 Thank you in advance.

our experts answer

Hello, yes it is compatible with a 48/32 rings. Regards.

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