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Item # SRM005G

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  • Red, 2.1/11sp ($196.95)
  • Black, 2.1/11sp ($196.95)
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Item # SRM005G

Ultra-smooth shifting without chain chatter.

Almost identical to the previous incarnation of SRAM's original X01 rear derailleur, the SRAM X01 2.1 Rear Derailleur features small improvements to the original, giving you smooth, precise shifting and ultra-reliable performance with your SRAM 1x11 drivetrain. Its X-Horizon design ensures steady horizontal chain movement, eliminating ghost shifting from your trail rides.

Loaded with industry-leading technologies, the rear derailleur's Roller Bearing Clutch, which reduces chain slap and bounce, keeps the bike nice and quiet over the roughest stretches of trail. Its Cage Lock technology offers fast, simple wheel removal and installation, thanks to its convenient locking mechanism. Simply push the derailleur's cage forward, lock it into place with the push of a tab, and freely work on your bike without the derailleur getting in your way. Please note that the X01 2.1 Rear Derailleur is only compatible with SRAM 11-speed XX1, X01, and X1 drivetrains.

  • X-Horizon (horizontal parallelogram design)
  • Roller Bearing Clutch
  • Cage Lock technology
  • Carbon cage
  • Sealed cartridge bearings

Tech Specs

[hardware] aluminum, [body/cage] carbon fiber, [bearings] steel
Claimed Weight:
252 g
Recommended Use:
mountain biking
Manufacturer Warranty:
2 years

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Unanswered Question

Can the SRAM X01 2.1 work with Shimano road shifters and an xtr
11-40 cassette? I am currently using a road link with a long arm ultegra to run my 11-40 cassette on my cyclo cross bike.

Simply awesome

  • Familiarity: I've put it through the wringer

First off I'll start by saying I'm not partial to Sram or Shimano. I own bikes with components from both companies. So what makes this different from a Shimano XT derailleur?

To start this derailleur is 20 grams lighter than an XT derailleur. Sure, that's not a huge weight savings for a derailleur that costs significantly more. However, this derailleur seems to shift quicker and more directly compared to it's counterpart. You also get the cage lock feature which makes installing and removing the rear wheel a snap.

While XT has the bargain advantage, I would say X01 has the performance and technology advantage. But if saving weight is your thing then you'll likely be considering this derailleur.

Make so much sense

  • Familiarity: I've put it through the wringer

Sure you might have to swap a handful of parts to make your drivetrain 11 speeds, including finding an XD driver for your current rear hub. But competitive cyclist has plenty of people to figure that out for you. And if you live around Salt Lake City, come see me in the retail store and I will even help you swap all of the parts. This derailleur is awesome because the clutch is plenty strong enough to keep enough chain tension to keep the chain from bouncing around, catching your frame and popping it of the front chainring. Especially when running a narrow-wide chainring. I also am a big fan on the button that holds the cage out of the way when taking the wheel on and off or just to get the chain back on if you biff it hard enough during a ride.

How is this different from the SRAM X01 DH 10 SPEED REAR DERAILLEUR? Is it primarily a difference in cage length? Are the jockey wheels smaller on this non-DH version? Thanks!

Thanks. The Specs. do not specify 1x10 or 1x11, although I now see the last sentence in the Description indicates 1x11.

It is different in the sense that it is a 11 speed rear derailleur and designed to work with an 11 speed shifter. The X01 DH is a 10 speed derailleur. They have a different pull. Let me know if you have any other questions!

Can't beat it

  • Familiarity: I've put it through the wringer

Very hard to tell a difference between this and XX1 rear. Crisp, clean, and precise shifting all up and down the cassette. The new b-knuckle helps it feel even more smooth. Much more distinct shifting compared to shimano, although they are both good systems.

outstanding derailleur!

  • Familiarity: I've put it through the wringer

The SRAM 1x11 system is outstanding. I love the simplicity of only shifting the rear derailleur along with reduced weight and accuracy. The X01 rear derailleur will keep your chain steady and works flawlessly and is highly recommended to complete your 1x11 group.

Smooth Shifting & Durable

  • Familiarity: I've put it through the wringer

While about 30 grams heavier than the XX1 derailleur, the shifting is just a crisp. With the extra weight comes a little more durability since it isn't made entirely of carbon. Definitely my go-to!

So far so good.

  • Familiarity: I've used it several times

I converted to 1 x 11 and got this for the derailleur. It has not failed me yet. I initially bought a SRAM rear cassette, but it did,'t fit my hub, so switched to SHIMANO and had no problem.