Shimano GRX RX812 11 Speed Rear Derailleur

Shimano GRX RX812 11 Speed Rear Derailleur
7 reviews
96,65 19,37 discount
In stock (only 3)

  • Delivery in 1-2 working days
  • Free tracked delivery to Luxembourg

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Pros & Cons

Pros & Cons

  • Thanks to this derailleur you can use a larger cassette and so cycle at a smoother pace.
  • This derailleur has an industrial look.
  • This derailleur can only be used with a single front chainring.
  • This derailleur can only be used with a single front chainring.
Read more on what our customers have to say about this product

Specifications

Specifications

Brand
Shimano
Number of gears
11 speed
Shifting Type
Mechanical
Type
Single
Cage Length
Long Cage
Maximum Capacity
31T
Weight
267 grams
Largest cassette sprocket
42T

Description

Description

With this Shimano GRX RX812 1x11 speed you can ride with a single front chainring and still smoothly crest those hills. This derailleur gives you the possibility to mount an 11/40 or 11/42 cassette. In addition, this derailleur is stable, quiet and shifts quickly and smoothly.

Stable and Smooth thanks to Clutch
This derailleur has a built-in clutch. Because of this clutch, the derailleur will not rattle if you cycle on rough terrain and the chain remains well tensioned. This greatly benefits shifting behaviour and the derailleur also makes little noise while cycling.

Watch out!
This derailleur can only be used with a single front chainring, so you can't use this derailleur with two front chainrings.

Which cassette can this derailleur handle ?

- Long cage (GS): 11/40, 11/42

User tips

Skew derailleur hanger?
A problem that crops up often is a skew derailleur hanger. It can happen if the derailleur knocked into something, for example in the case of a fall on the bike. Luckily it can be fixed! You can read more here.

Clean the jockey wheels well too!
Just like the chain, the jockey wheels on a derailleur get super dirty. As a result the shifting is not as good and it does the lifespan of your derailleur no good. For that reason, it's a good idea to clean the jockey wheels at the same time when you clean and lube your chain. Do this by running a cloth along the jockey wheel while gently turning the chain. Of course it gets to a point where the jockey wheels are worn out. In this blog post you can find out more about when jockey wheels should be replaced and what you'll need.
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Reviews

Reviews


5 / 5

Fast and good!

- Dennis 21 November 2022

Top

Pros & Cons

Great price
Superfast delivery
Top product
Automatic translation

5 / 5

excellent upgrade for a 1x road setup

- Darren 21 December 2019

I needed a clutched rear mech that would work with my Tiagra 4700 shifters and this fitted the bill perfectly.

Pros & Cons

clutch
easy setup
smooth shifting
none

5 / 5

Easy to fit and very precise

- Ben 10 December 2019

Great value for money and a great bit of kit for any Gravel Bike.

5 / 5

Great product at the best price!

- Tim 28 August 2019

Finally shimano get on board with a 1x gravel groupset. Lovely mech that worked faultlessly with STI shifters from the start without any bodges or work arounds.

Pros & Cons

Clutch
Looks
STI comparability
Expensive compared to MTB equivalents

5

Dennis, 21 November 2022

Fast and good!

Top

  • Great price
  • Superfast delivery
  • Top product
Automatic translation

5

Darren, 21 December 2019

excellent upgrade for a 1x road setup

I needed a clutched rear mech that would work with my Tiagra 4700 shifters and this fitted the bill perfectly.

  • clutch
  • easy setup
  • smooth shifting
  • none

5

Ben, 10 December 2019

Easy to fit and very precise

Great value for money and a great bit of kit for any Gravel Bike.

5

Tim, 28 August 2019

Great product at the best price!

Finally shimano get on board with a 1x gravel groupset. Lovely mech that worked faultlessly with STI shifters from the start without any bodges or work arounds.

  • Clutch
  • Looks
  • STI comparability
  • Expensive compared to MTB equivalents

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Shimano GRX RX812 Shimano GRX RX810 Shimano GRX RD-RX822 SGS
Shimano GRX RX812 Shimano GRX RX810 Shimano GRX RD-RX822 SGS
7 reviews 5 reviews 0 reviews
Number of gears 11 speed 11 speed 12 speed
Shifting Type Mechanical Mechanical Mechanical
Type Single
Cage Length Long Cage Long Cage Long Cage
Maximum Capacity 31T 40T
Weight 267 grams 251 grams 288 grams
96,65 91,81 101,48
This product View product View product