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Sram MTB Gx Type 2.1 Long Cage Rear Derailleur - Black, 10-Speed

4.4 4.4 out of 5 stars 649 ratings

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Brand SRAM
Color Black
Material Aluminum
Item Weight 157 Grams
Mounting Type Braze-On Mount

About this item

  • Roller bearing clutch in the pulley cage pivot for better chain control
  • Roller Bearing Clutch delivers maximum drivetrain stability even through the most punishing terrain
  • Largest Cog: 36
  • Chain Wrap Capacity: 47
  • Cage Length: Long

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Sram MTB Gx Type 2.1 Long Cage Rear Derailleur - Black, 10-Speed


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Customer reviews

4.4 out of 5 stars
4.4 out of 5
649 global ratings

Customers say

Customers like the performance, shifting, and value of the bicycle derailleur. For example, they mention it works great, shifts smoothly, and is a reasonable priced replacement for the X9. Some appreciate the ease of installation. That said, some complain about the alignment. Opinions are mixed on quality, appearance, and fit.

AI-generated from the text of customer reviews

29 customers mention23 positive6 negative

Customers like the performance of the bicycle derailleur. They mention that it works great, it all works very well together, and it works perfectly with their Rival shifters. The clutch works great and there is no decline in shifting performance on the trail.

"...It is now March 2024 and it is performing superbly." Read more

"...However, on the trail, there is no decline in shifting performance from the X9 (X0 shifter used). It feels identical...." Read more

"Works great, and I appreciate the newer features such as the clutch and the lock out...." Read more

"...The amount of play in the mounting bolt make this derailleur unusable. It will never shift properly...." Read more

29 customers mention21 positive8 negative

Customers like the shifting of the bicycle derailleur. They say it's easy to adjust, reliable, and precise. Some mention that the shifting is smooth as glass and hasn't given them a single problem after. Overall, most are satisfied with the smoothness of the gear change.

"...I would recommend. I have only ridden it about 8 times but no shifting issues...." Read more

"...had several rides with it and can not how quiet it is and the shifting is so smooooth it's unbelievable...." Read more

"...It will never shift properly...." Read more

"...When shifting I can't tell if it has shifted with how quiet it and smooth it is definitely recommend." Read more

15 customers mention15 positive0 negative

Customers are satisfied with the value of the bicycle derailleur. They mention it's a great product for the price, a reasonable replacement for the X9, and totally worth it. Some say that the SRAM GX10 is a spectacular budget performance racing derailer.

"...they hang down asking to be knocked off but, reasonable priced replacement for the x9...." Read more

"...a great entry level little noice but it dose the job and for the price is great,..." Read more

"...All in all, I think the SRAM GX10 is a spectacular budget performance/racing derailer." Read more

"...Shifts reliably. I think it's a really good value." Read more

9 customers mention9 positive0 negative

Customers find the installation process of the bicycle derailleur to be easy. They mention that it is smooth, easy to set up, and works well on their bike.

"...Hi and Lo limit screws have no problems.Very easy to install and adjust...." Read more

"...and this is a great model with the lock makes it real easy to work on the bike...." Read more

"...No trouble installing the new derailleur but had a little adjusting it...." Read more

"...Instalation and adjustment were easy. When shifting I can't tell if it has shifted with how quiet it and smooth it is definitely recommend." Read more

46 customers mention22 positive24 negative

Customers are mixed about the quality of the bicycle derailleur. Some mention it's a really quality bit of gear, dependable, and durable. However, others say that the quality was so low, the GX broke after a couple of uses, and the B-screw was damaged.

"...I have only ridden it about 8 times but no shifting issues. Durability, they hang down asking to be knocked off but, reasonable priced replacement..." Read more

"...] Rarely submit one star reviews but quality of this was so low I felt I had to add another one to the list and warn others...." Read more

"...Can't comment about durability yet, but so far the RD looks durable." Read more

"...by the amount of play in the parallel links, the rivets or rivet holes were badly worn. This was the cause of the ghost shifting...." Read more

9 customers mention6 positive3 negative

Customers are mixed about the appearance of the bicycle derailleur. Some mention that it looks good, is a nice rear derailleure, and has a better cable clamp design than the X9, while others say that the B screw, set screw, and stopper are poorly designed.

"...It looks great and is quiet. You can't go wrong with this derailleur!" Read more

"The b-screw is very poorly designed and it skips the hanger, bending the screw or stripping the thread. Second one this has happened to." Read more

"First off, the SRAM GX 2.1 is really a nice rear derailleur...for the most part. It does shift really clean, when right...." Read more

"Cable clamp is a better design that the X9, because it has a block under the screw. The X9 held up real well for 3 years of abuse...." Read more

6 customers mention3 positive3 negative

Customers are mixed about the fit of the bicycle derailleur. Some mention that it's easy to fit, adjust, and reliable. However, others say that the cage seems a little short and the chain was too short.

"I replaced my SRAM X9 long cage on a 9 speed (27) with this. It fits fine and of course had tuning to do...." Read more

"...The cage seems a little short but that could be user error. I put this on my CX bike when I got tired of dropping my chain in the middle my races...." Read more

"...derailleurs on a few rebuilds to 1X10 and they are bulletproof, easy to adjust, reliable, and shift smoothly." Read more

"Cage isn't long enough." Read more

12 customers mention0 positive12 negative

Customers are dissatisfied with the alignment of the bicycle derailleur. They mention that the B screw does not line up, the adjustment screws on this thing are terrible, and there is too much play with the B-screw configuration. The screw is not alienable and it strips and slides. Some say that the high and low adjustment screws are not labeled.

"...some time and this is made for light use not for trails the B screw dose not line up and it be came lose after messing around with it to fox it so..." Read more

"The B set screw and stopper don't align. So if you want to use a wide range cassette, the screw falls to the side of the stopper...." Read more

"...The GX is made from cheaper material and the High and Low adjustment screws are not labeled as with the X-7...." Read more

"Must say disappointed requires a goat link 2 reach 10th gear B screw doesnt line up bent 2 never had such a hard time tuning in a derailleur" Read more

Works perfectly with my Rival shifters
5 Stars
Works perfectly with my Rival shifters
Ordered this to use with my Rival shifters so I can use a bigger cassette for climbing.I was worried initially because of the bad reviews, but so far I haven't a single problem.Springs are good.No wobbly linkages.B tension screw and plate are working.Hi and Lo limit screws have no problems.Very easy to install and adjust.I am still waiting for my new cassette (11-36) and new chain, but I predict that there will be no problem adjusting the RD when I swap parts.Can't comment about durability yet, but so far the RD looks durable.
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Top reviews from the United States

Reviewed in the United States on February 23, 2024
Reviewed in the United States on December 17, 2022
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5.0 out of 5 stars Works perfectly with my Rival shifters
Reviewed in the United States on December 17, 2022
Ordered this to use with my Rival shifters so I can use a bigger cassette for climbing.

I was worried initially because of the bad reviews, but so far I haven't a single problem.
Springs are good.
No wobbly linkages.
B tension screw and plate are working.
Hi and Lo limit screws have no problems.

Very easy to install and adjust.
I am still waiting for my new cassette (11-36) and new chain, but I predict that there will be no problem adjusting the RD when I swap parts.

Can't comment about durability yet, but so far the RD looks durable.
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3 people found this helpful
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Reviewed in the United States on January 25, 2021
Reviewed in the United States on October 8, 2020
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4.0 out of 5 stars Great shifter snik , chunk, snik , chunk
Reviewed in the United States on October 8, 2020
Took the plunge and went to a 1x system.
Really quality bit of gear, upped my shifting game 1000%.
4 stars out of box.
Once it was adjusted properly and i fixed /modded the Bscrew, it became 5 stars performance for a 3 star price point.
Make sure you pair this with all GX components and it will work like clockwork, freakishly shifting like a... well F1 machine...
I used an SRAM GX10 derailer, gx10 shifter, and gx10 cartridge, with a shimano M361 crankset (had to penny pinch) and steel sprocket, that worked well but dropped the chain 3 times in a week of riding soo... now have a race face 36frnt chainring.

haven't dropped the chain since .

All in all, I think the SRAM GX10 is a spectacular budget performance/racing derailer.
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2 people found this helpful
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Reviewed in the United States on November 9, 2023
Reviewed in the United States on September 27, 2023
Reviewed in the United States on September 16, 2023
Reviewed in the United States on February 21, 2020
3 people found this helpful
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Top reviews from other countries

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Manny
5.0 out of 5 stars Muy buen producto
Reviewed in Mexico on January 5, 2024
louis tremblay
5.0 out of 5 stars Derailleur
Reviewed in Canada on July 14, 2023
Cal Bosveld
5.0 out of 5 stars Came fast, worked well. Thanks!
Reviewed in Canada on December 9, 2021
Style: ShortVerified Purchase
denis martin
4.0 out of 5 stars Robustesse
Reviewed in France on February 22, 2024
Style: ShortVerified Purchase
Fificazo
5.0 out of 5 stars Parfaitement adaptable
Reviewed in France on October 5, 2023