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SRAMX1 11-Speed Rear Derailleur Type 2.1

Sale 25% OffCurrent price:$164.99 Original price:$220.00

Item # SRM005I

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  • One Color, One Size ($164.99)
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Item # SRM005I

Why We Like The X1 11-Speed Rear Derailleur Type 2.1

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. We like that 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.

  • Reliable performance for predictable and smooth gear shifts
  • Roller bearing clutch delivers stability
  • Sealed cartridge bearings and SRAM's cage lock for efficiency
  • Improved elements for better performance and longevity

Tech Specs
Material[body/cage/hardware] aluminum, [bearings] steel
CompatibilitySRAM 1x drivetrains only
Recommended Usemountain biking
Manufacturer Warranty2 years

Actual Weight

One Color, One Size

Claimed Weight

Claimed weights are provided by the vendor.

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Actual weights are measured in-house by the Competitive Cyclist team.

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What do you think about this product?



What is the max tooth size this can handle?

>Rating: 5

Worth the buy

I've used it several times

There is nothing bad to say about this rear jockey. Quick response to shifting up or down and new design keeps the chain tight. Good price can’t go wrong.

>Rating: 5

Tough but light

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?

>Rating: 5

Perfect option

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

>Rating: 4

Great Shifting For A Good Price

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).