Baby steps amid the leaps.
SRAM's X1 group harnesses all of the groundbreaking technological and design features of the more expensive XX1 and X01 groupsets, but renders it without the more expensive materials to keep cost down a bit. The SRAM X1 Type 2.1 Rear Derailleur takes the original design and makes some tiny improvements to elements like the bearings and the clutch mechanism to ensure better performance and longevity.
As mentioned, the X1 11-Speed Rear Derailleur packs in all of SRAM's top one-by engineering to ensure rear shifts are smooth, accurate, and predictable. Starting with the offset pulleys, the tall square-toothed X-Sync profiles work to positively engage and manage the chain better than traditional pulleys. These pulleys work in conjunction with the X-HORIZON's straight parallelogram design, which limits all movement to the horizontal axis, thus eliminating ghost shifting and reducing shifting force. SRAM's proven Roller Bearing Clutch is also present, which delivers maximum drivetrain stability by maintaining consistent tension on the chain — even while riding in the most demanding conditions. Finishing off the rear mechanism are sealed cartridge bearings and SRAM's handy Cage Lock design that keeps the derailleur locked out of the way for easy rear wheel installation/removal.
SRAM's X1 Type 2.1 Rear Derailleur is available in one color and is only compatible with SRAM 11-speed XX1, X01, or X1 drivetrains.
View more Mountain Rear Derailleurs
Reviews & Community
Tough but light
- Familiarity: I've used it once or twice and have initial impressions
Accurate shifting in a light weight package without any carbon to break--what's not to love!?
Just received a X1 derailleur. Does the chain gap adjustment tool come with. I did not receive one. Any idea on measurements?
- Familiarity: I've used it several times
The 7g extra weight of the all-alloy rear derailleur cage also buys you a more crash proof part than the semi-carbon X01
Great Shifting For A Good Price
- Familiarity: I've put it through the wringer
Crisp, clean and efficient, I've found that this derailleur not only handles the everyday small hits, but the big crashes and total smashing, too. Thoroughly impressed with both the quality of the derailleur and the longevity of life (especially as someone who goes through derailleurs rather quickly).