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Item # SRM005J

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Item # SRM005J


The SRAM X9 Type 2.1 Rear Derailleur takes the revised Type 2 design and makes some minor changes like upgraded bearing seals and a tiny reduction of weight. Otherwise, it's the same Type 2 goodness that countless riders have bolted onto their machines for the better. SRAM's Type 2 derailleur technology differs from its competition in a key way. Rather than opting for an adjustable friction band, SRAM put a Roller Bearing Clutch in its Type 2 derailleurs. The clutch comes pre-set from the factory to provide a certain amount of friction inside the derailleur cage pivot. This friction keeps the cage from bouncing up and down over rocky trails and de-tensioning the chain. Because it's pre-set at the factory, SRAM's Type 2 clutch can't be disengaged or adjusted like Shimano's Shadow Plus mechanism. That being said, the Type 2 clutch is self-lubricating, and there are no external moving parts, so unlike the Shadow Plus system, it's designed to be maintenance-free. The Type 2 mechanism adds about 30 grams to the weight of a standard X9 rear derailleur.

A unique feature of the Type 2 system is that its Cage Lock technology allows you, with the push of a button, to lock the derailleur cage in an extended position. This is a nice feature that allows for easier-than-ever rear wheel installation. There's no need to worry if you accidentally leave the derailleur cage locked; it will return to normal operating position when you hit your first bump. Another benefit of the Cage Lock is that it makes chain installation a bit easier; you don't have to maintain a consistent pulling force on the cage while joining the two chain ends.

  • Compatible with ten-speed drivetrains
  • Roller Bearing Clutch
  • Cage Lock technology

Tech Specs

Recommended Use:
Manufacturer Warranty:
2 years

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Great Update

  • Familiarity: I've put it through the wringer

Rear derailleurs get a lot of use, and a lot of wear and tear. When the time came to replace my bike's original X0 rear derailleur I went with the new Type 2.1-equipped X9. The clutch greatly reduces chain slap and with a minimum of extra effort at the shift lever. I have always loved SRAM's precise, mechanical-feeling shifting and the clutch seems to emphasize that positive engagement.

Avg. ride time: 4h 27m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

No drop

  • Familiarity: I've used it several times

Don't drop that chain with the type 2.1 rear derailleur. Great quality, great shifting performance, and the new type 2 is fantastic and keeps the bike quiet. I have these on a few bikes and would purchase again!

^ what they said

  • Familiarity: I've put it through the wringer

I'm not a tech, so I can't go off on how great this RD is. I used to have the X9 and have bashed it up and was needing to upgrade. I liked everything about the X9 so I just went for the same thing, but better. So far so good. I think I've noticed less chain slap...