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  1. #1
    Senior Member
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    Shimano Freehub rachet malfunction

    I have a Shimano 7-speed freehub on one of my bikes from the late 1990's that has a fairly high rolling resistance through about 1/4 of its revolution and the rachet also changes pitch.

    I'm assuming it's kaput as I don't think there's any way you can service it.

    My question:

    I looked on ebay and there are multiple different Shimano 7-speed freehubs such as:

    http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWAX:IT

    and

    http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWAX:IT

    I haven't a clue which one would fit, if either. Suggestions?

  2. #2
    Senior Member
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    Can't offer a suggestion without knowing which hub you have. Also, what cassette range are you using?

    BTW, try laying your rear wheel flat on a workbench with the freehub facing up and dribble a bunch of light oil into the seam between the stationary core and the rotating outer shell while turning the cogs by hand. See if that corrects the problem.

  3. #3
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    Actually, I removed it and immersed it in machine oil while turning and which didn't seem to help.

    I don't remember any part numbers or other ID on it. I'll have to check again.

  4. #4
    Insane Bicycle Mechanic Jeff Wills's Avatar
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    Quote Originally Posted by Raleigh71 View Post
    I looked on ebay and there are multiple different Shimano 7-speed freehubs such as:

    http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWAX:IT

    and

    http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWAX:IT

    I haven't a clue which one would fit, if either. Suggestions?
    Either of those will probably work. I've swapped freehubs back and forth between 7 and 8/9-speed with few issues. The only trouble I've had is with higher-end hub shells (Deore XT and XTR) not matching lower-end cassette bodies (LX and below). Once you know what hub you're playing with, we'll be able to say with more certainty.
    Jeff Wills

    All my bikes.

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