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X01 2.1 Rear Derailleur

5 out of 5 stars
1 Review
Current price: $184.00 Original price: $230.00
20% off

Style & Size:


Why We Like The X01 2.1 Rear Derailleur

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.


  • SRAM's mountain rear derailleur for SRAM elite 1x11 drivetrains
  • X-Horizon technology keeps shifting precise, smooth, and free of ghosts
  • Roller Bearing Clutch controls chain vertical movement on rough terrain
  • Cage Lock improves wheel install and removal efficiency
  • Carbon cage steps up the strength and tones down the weight
  • Sealed cartridge bearings for smooth rolling and lasting performance
  • Item #SRM005G
[hardware] aluminum, [body/cage] carbon fiber, [bearings] steel
Cassette Range
SRAM 1x11 drivetrains
Claimed Weight
8.8oz (250g)
Manufacturer Warranty
2 years

Overall Rating

5 based on 1 ratings

Review Summary

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5 Stars - 1 reviews


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5 out of 5 stars

June 5, 2020

Works great, but expensive

I've put it through the wringer

I got this derailleur to replace a 4-year old very-loved X01 that I broke. Replacement was simple, b-limit adjustment wasn't hard after finding the correct spacing on Sram's spec sheet. Shifting is precise, especially with Shimano's SP41 and replacement of the rest of the drivetrain components at the same time. I am using an X01 cassette, chain, and a Wolf Tooth elliptical 30T chainring. Has not caused me any issues yet, so I am happy with the performance. My only wish is for the older 11-speed design to be reduced in price, seeing that the industry has shifted to 12-speed.

Melinda Z

Originally reviewed on Backcountry.com