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  • SRAM X1 Rear Derailleur - OE
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SRAMX1 Rear Derailleur - OE

Item # SRM004K

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  • Black, One Size ($231.00)
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Item # SRM004K

Back-end bargain.

The SRAM X1 Rear Derailleur takes the same design of the XX1 and X01 rear derailleurs and eschews some carbon and titanium for cost-saving aluminum bits, rendering a piece that performs just as well but with a touch of weight gain as your only penalty.

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.

Tech SpecsWeight
Tech Specs
[body/cage/hardware] aluminum, [bearings] steel
42 t
Recommended Use
mountain biking
Manufacturer Warranty
2 years

Actual Weight

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

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Black, One Size

Claimed Weight

Claimed weights are provided by the vendor.

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257 g

Reviews & Community


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X1 Group

  • Familiarity: I've used it several times

Sram's X1 group is worth every penny. Clean crisp shifting and relaible platform makes for an awesome drivetrain.

Just as Smooth

  • Familiarity: I've put it through the wringer

I've used X01 derailleurs in the past and I can honestly say I can't notice a difference between them and the X1. The shifting is buttery smooth and I'll gladly take the 5 grams for the cost savings.

Excellent Sram product

  • Familiarity: I've used it several times

Just made the transition to one by 11 and I'm impressed. Shifting is smooth and consistent. The derailleur is reliable and easy to adjust. All at a great price.