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  1. #1
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    Sram X9 Rear Hub Overhaul

    Hoping someone can help out. I can't figure out how to get my X9 hub apart. Brake side is easy but the drive side you cannot reach the inner nut. Looked on sram's website and the service manual I found was useless and I failed on youtube. Anyone know what to do?

  2. #2
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    If you are talking about removing the freehub body. I involves a 11mm allen wrench. I just bought the freehub body and brought it to my local shop and they had the 11mm allen needed. They replaced it for free.

  3. #3
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    Thanks I'll have to stop by the store tomorrow to find an 11mm allen. Any idea what size the rotor side bearing is? Looking at the spare parts list on sram's site they appear to be the same but pulling the drive side bearing off it's clearly a different size.

  4. #4
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    That 11mm allen is an oddball size allen wrench. Probably wont find it at home depot or anything. I'm not sure the size on the driveside bearing. Mine was still good when I pulled mine apart, so I just re-installed it.

  5. #5
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    Freehub is out. Still have no idea how to get to the rotor side bearing out with it out.

  6. #6
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    Quote Originally Posted by rmgoff1 View Post
    Freehub is out. Still have no idea how to get to the rotor side bearing out with it out.
    Is the bearing bad? If not leave it. If its bad, use the axle or a punch to pop it out.

  7. #7
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    Bringing back an old thread but I'm currently dealing with two of these. Let me just start by saying that this is a poorly designed hub. Second, unless they made some changes, the exploded view on their web site is wrong. The biggest problem I can see is that the drive side "cone nut" is inaccesable when the hub is assembled, which is the only time you need to get to it.

    Dissassembly is simple; clamp drive side axle protrusion in axle vise, loosen non-drive side hardware with cone wrenches and remove, tap NDS side of axle with mallet till axle and bearing (and ruined seal) come out. Remove NDS bearing (and another ruined seal) with blind bearing remover tool.

    The bit I'm stuck at is reassembly and "adjustment". I simply can't find a good way to install the DS bearing and get the hardware properly tightened. And even if I do, since my hubs have no shoulder on the NDS of the axle, which is what the exploded view shows, they have to be manually adjusted, which is essentally impossible all things considered.

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    Update: Sram basically doesn't support these hubs, they buy them from a third party and distribute them. That being said they were as helpful as they could be and think a free hub and some spare bearings were worth my troubles. I'm going to attempt to get the old one rolling again, although I will have to invent a procedure to install the DS bearing and axle at the same time as an assembly, but worst case scenario I have to spend 30 bucks on some spokes and relace a wheel.

  9. #9
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    Quote Originally Posted by big_papa_nuts View Post
    Update: Sram basically doesn't support these hubs, they buy them from a third party and distribute them. That being said they were as helpful as they could be and think a free hub and some spare bearings were worth my troubles. I'm going to attempt to get the old one rolling again, although I will have to invent a procedure to install the DS bearing and axle at the same time as an assembly, but worst case scenario I have to spend 30 bucks on some spokes and relace a wheel.
    Update number 2: I have received the replacment hub from Sram, opened it to see if the hub had a NDS bearing shoulder on the axle, like the Sram rep and their exploded diagram ensured me it would, and (like the other two I have) it does not. I have come up with a simple way to "adjust" them (by measuring the NDS axle protrusion) but still need to come up with a way to deal with the DS BS.

  10. #10
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    They are common bearings, I find replacements easily.
    Drive side bearing: 6900RS
    NDS bearings: 6903RS

  11. #11
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    Well, three years after the last post in this thread, and the hub is on its third set of bearings but still working fine. I actually saw somewhere SRAM was selling replacment freehubs too.

  12. #12
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    Three sets of bearings in three years? I probably shouldn't ask but where are you buying bearings from? The Chicom variants on eBay are crap. So unless your doing something else like power washing or using NASA grade de-greasing agents on your hubs, those bearings should last (quoting the immortal Michael "Squints" Palledorous)... Forever.

    A double sealed NSK or Nachi bearing will last longer than anything you'll buy off of eBay or Amazon. Problem is, you wont get it for $3.99. A thin wall bearing that small is going to take a beating in a rear hub, especially a hard tail.
    Last edited by Desert Diesel; 04-04-2017 at 04:13 AM.

  13. #13
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    If it is the X9 hub that I had, with only two bearing cartridges, one rather small, then I'm impressed that he has only gone through three sets in three years. One of my cartridges did not even survive the first xc ride. The replacement one from Sram only lasted a couple xc rides. And I am mellow 160 lbs.

  14. #14
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    Considering the cost I'm actually really impressed how much life I have gotten from this hub. The design is pretty half ass and the bearings are tiny but it hasn't blown up yet. Though it is just on a commuter, I don't think I would choose it for a MTB build.

    Pro tip: treat the drive side hardware with Loctite 290 to keep it from backing off during use and destroying the bearings.

  15. #15
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    do you need any special tools to service this hub? Other than the 11m allen wrench?

  16. #16
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    A 15mm and 16 or 17mm (don't remember) cone wrenches and a rubber mallet, the 11mm allen, good grease; a bearing extractor should be ideal but you can work it out with a long pinch or a flat screwdriver and the rubber mallet and you can place the bearings with the caps and the axle of the same hub (pressing it when you turn the nuts) at least for the back hub 135x9mm.

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