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Cassette Wobble -- not freehub
I've been noticing a noise in my drivetrain in low gears. I isolated it
to cassette wobble, but was surprised to find that it was literally the cassette wobbling on the freehub -- not the freehub body (or in Chris King terms, the drive shell) wobbling on it's bearings! It's an XT 11-34 cassette on a Chris King hub. The hub is tight. It turns out that the 11 tooth ring's splines do not go all of the way through -- there's in effect, a stop. For some reason, the gear stack is not as deep enough to be held firmly when the retaining ring is tight -- I can tip them a good bit, but the 11 tooth remains firmly unmoving (as does the drive shell). Ok, I put a thin spacer under the stack and now my gears are tight (and shift better). My questions are... Is this normal and I just didn't notice it before? Do I need to replace the drive shell? How do I prevent it from happening again? David |
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Cassette Wobble -- not freehub
On Tue, 19 Aug 2003 00:52:46 GMT, David Kunz
may have said: My questions are... Is this normal and I just didn't notice it before? It is my understanding that it is "normal" for some 11T sprockets, specifically Shimano Hyperdrive-C, to be unable to go all the way down on a hub that does not have the relieved ends on the splines which are present on the Shimano "compact" freehubs. In other words, to use certain 11T sprockets on certain freehubs, either a shim is required (as you have now installed), or a mod to the hub is needed; more info is he http://www.sheldonbrown.com/k7.html Skip down to the part on Hyperdrive-C Do I need to replace the drive shell? That's an option. How do I prevent it from happening again? I think you just did, with the spacer. -- My email address is antispammed; pull WEEDS if replying via e-mail. Yes, I have a killfile. If I don't respond to something, it's also possible that I'm busy. |
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Cassette Wobble -- not freehub
Werehatrack wrote:
On Tue, 19 Aug 2003 00:52:46 GMT, David Kunz may have said: My questions are... Is this normal and I just didn't notice it before? It is my understanding that it is "normal" for some 11T sprockets, specifically Shimano Hyperdrive-C, to be unable to go all the way down on a hub that does not have the relieved ends on the splines which are present on the Shimano "compact" freehubs. In other words, to use certain 11T sprockets on certain freehubs, either a shim is required (as you have now installed), or a mod to the hub is needed; more info is he http://www.sheldonbrown.com/k7.html Skip down to the part on Hyperdrive-C Do I need to replace the drive shell? That's an option. How do I prevent it from happening again? I think you just did, with the spacer. Thanks, In other words, it's been doing it all along and I've just been too dense to notice it! It's most anoying that my LBS had no clue about this (I asked there 1st) -- but the wrench that I trust was out when I stopped by. David |
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