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  1. #1
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    Trek 7.3fx Shimano RM30 Rear Hub Repack

    Was wondering if a fellow forum member could walk me through how to repack a Shimano RM30 8 speed rear hub on a Trek 7.3fx bike as well as what tools I would need. I'm a newbie. Thanks.

  2. #2
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    Instead of having a forum member do a ton of typing, without benefit of photo's, you should search the net for tutorials. There are many available for free, both text and pictures and video. You might not find your exact hub but you shouldn't have a problem finding one that's basically the same.

    I always suggest reviewing at least two different tutorials until you have a sense of the job, then you can dig in. If you then have a specific question, or something that you can't grasp, that's when you can come back here for help past that.
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  3. #3
    Insane Bicycle Mechanic Jeff Wills's Avatar
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    Quote Originally Posted by FBinNY View Post
    Instead of having a forum member do a ton of typing, without benefit of photo's, you should search the net for tutorials. There are many available for free, both text and pictures and video. You might not find your exact hub but you shouldn't have a problem finding one that's basically the same.
    This one is good: http://www.parktool.com/blog/repair-...and-adjustment
    Jeff Wills

    All my bikes.

  4. #4
    Constant tinkerer FastJake's Avatar
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    Quick list of stuff off the top of my head:

    - Cassette lockring tool + 1" wrench (removing the cassette makes cleaning out the hub much easier)
    - Chainwhip
    - 15mm and/or 17mm wrench
    - 13/15mm cone wrench
    - Solvent (mineral spirits, paint thinner, etc.)
    - Grease
    - New 1/4" ball bearings

    Should be everything if I'm not mistaken. Also, read cone adjustment http://www.sheldonbrown.com/cone-adjustment.html and hub overhaul http://www.sheldonbrown.com/tooltips/hubs.html
    Last edited by FastJake; 02-08-12 at 09:15 AM.
    Why "derailer" is the correct way to spell the gear-change mechanism: sheldonbrown.com/derailer.html

  5. #5
    Senior Member Bill Kapaun's Avatar
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    Something also handy is-
    http://techdocs.shimano.com/techdocs/index.jsp

    You can click on the Mountain Bike > Altus section and download the tech docs for your hub.
    Sometimes, seeing an exploded view of a mechanism can give a little extra confidence, although repacking bearings is a fairly simple job.

    You really don't need any degreaser if you buy some new Ball Bearings (recommended).
    You can simply wipe out the old grease with a rag/paper towel.

  6. #6
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    Thanks Bill!

  7. #7
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    Thanks Jake

  8. #8
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    Thanks Jeff

  9. #9
    Insane Bicycle Mechanic Jeff Wills's Avatar
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    Quote Originally Posted by bowiefan View Post
    Thanks Jeff
    You're welcome!
    Jeff Wills

    All my bikes.

  10. #10
    Senior Member Solare's Avatar
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    Thanks for the links. Now it is time to get the tools and get to work.

  11. #11
    Senior Member Bill Kapaun's Avatar
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    http://techdocs.shimano.com/media/te...9830800934.pdf

    Cone uses a 15mm wrench.
    Lock nut uses a 17mm wrench.

    I happen to have a couple of these hubs.

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