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Shimano GRX RD-RX812 Shadow RD+ Direct Rear Derailleur

Shimano GRX RD-RX812 Shadow RD+ Direct Rear Derailleur


Shimano GRX RD-RX812 Shadow RD+ Direct Rear Derailleur

Product description Shimano GRX RD-RX812 Shadow RD+ Direct Rear Derailleur


- 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


- 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


- 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


- 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

At this moment, Shimano GRX RD-RX812 Shadow RD+ Direct Rear Derailleur is at best price and is perfect for your activities. At bikeinn, you can find other products that complement into our Bike parts catalogue and particularly into our Rear gears category. We have a variety of Rear gears to suit your needs and to make you feel inspired to do more sport in your daily routine.

Features Shimano GRX RD-RX812 Shadow RD+ Direct Rear Derailleur

Recommended use
Gravel cycling
Box size

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Very good product


very good quality and great shifting

Shimano grx rd-rx812


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

Shimano RD-RX810


Box version with short cable and long tongue cover cap



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


Beautiful and precise shifting, shimano is always a guarantee

Shimano GRX


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



Super trade. Fast and at a good price.

Great shifting


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



Fast delivery!! Product is great.

Super fast delivery


Great shop, great fast delivery! Better is possible!

RD GRX Shadow Plus 812


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


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



Fast and respected delivery time



Accurate, robust and elegant.



After tiagra, it seems like a heavenly switch.

The best diversion ever made by shimano


super smooth and precise to the touch !!

Excellent product


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


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.



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

Shimano grx great


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 !!


Nice RD But the box is not clean...

Great !!!!


A very fine change, great quality.

GRX - Another Quality Product from Shimano


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


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.



Nice product from shimano. Delivered the products as expected!

GRX - RD for the double crankset


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.

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