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Cassette oscillating

Old 02-12-20, 06:06 PM
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bonsai171
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Cassette oscillating

Took my cassette off to clean, and re-installed. Now the gears seem to shift side to side when I spin it. Is that normal?


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Old 02-12-20, 08:41 PM
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No, is the lock ring on straight?
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Old 02-12-20, 08:46 PM
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Originally Posted by katsup View Post
No, is the lock ring on straight?
I threaded it on by hand first, so it should be.
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Old 02-12-20, 08:48 PM
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Originally Posted by bonsai171 View Post
I threaded it on by hand first, so it should be.
That's just the simplest explanation. I'd take off the cassette and spin the freehub alone to see if you see play there. That will narrow it down to being a cassette issue or more serious freehub issue.
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Old 02-12-20, 09:17 PM
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It isnt normal.
something is loose. Maybe a spacer is missing, maybe the lock ring isnt tight enough, not sure what. But no the cassette shouldn't wobble.
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Old 02-12-20, 11:54 PM
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I think you have a freewheel and that would be normal as a Freewheel is a self contained unit and the quality of freewheels varies. If it is indeed a cassette that slides onto a freehub body then you might want to make sure you are using the thin spacer that goes on the freehub before the cassette.
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Old 02-13-20, 02:26 AM
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Depending on what cassette and hub you have you may need a spacer or two behind the cassette. Happened to me twice when I first went to 10 speed and took me hundreds of miles to even notice.
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Old 02-13-20, 06:56 AM
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A little wobble is normal, particularly for f/w hubs. Big enough to influence shifting is not normal.
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Old 02-13-20, 07:45 AM
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Originally Posted by Spoonrobot View Post
It's normal (assuming you assembled correctly).

https://yarchive.net/bike/freewheel_wobble.html
Wow, i didnt even think to look at the # of cogs. If its a freewheel, ive had some that would wiggle and wobble with loose play inside. Even then, I figured that it was due to poor tolerances and because they were cheaper replacements...but maybe not.
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Old 02-13-20, 02:54 PM
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OP mentioned cassette, and he responded about the lock ring, so I'm guessing it's a cassette, but we'll have to wait and see.
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Old 02-13-20, 03:08 PM
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Looking at the hub, the stepped design of the center part of the hub is very characteristic of early Shimano freehubs/cassettes.

So, I'd bet a 99% chance it is actually a cassette.

It wouldn't hurt to take the cassette off and verify that nothing is bent, or out of place, but I wouldn't be particularly concerned with a minor wobble either.

How does the axle turn?
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Old 02-13-20, 05:44 PM
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Originally Posted by BoozyMcliverRot View Post
I think you have a freewheel and that would be normal as a Freewheel is a self contained unit and the quality of freewheels varies. If it is indeed a cassette that slides onto a freehub body then you might want to make sure you are using the thin spacer that goes on the freehub before the cassette.
It is definitely a cassette, and I have the spacer on the freehub before the cassette.
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Old 02-13-20, 05:57 PM
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Originally Posted by CliffordK View Post
Looking at the hub, the stepped design of the center part of the hub is very characteristic of early Shimano freehubs/cassettes.

So, I'd bet a 99% chance it is actually a cassette.

It wouldn't hurt to take the cassette off and verify that nothing is bent, or out of place, but I wouldn't be particularly concerned with a minor wobble either.

How does the axle turn?
I was planning to take the cassette off a second time, but the chain on my chain whip broke in the process. Oddly enough, the bike shifts fine with the cassette wobbling. Been thinking about just leaving it alone at this point

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Old 02-13-20, 06:00 PM
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Originally Posted by bonsai171 View Post
I was planning to take the cassette off a second time, but the chain on my chain whip broke in the process. Oddly enough, the bike shifts fine with the cassette wobbling. Been thinking about just leaving it alone at this point

Dave
As mentioned above, freewheels tend to wobble like that with no ill effects. Perhaps even improving shifting. So, if there aren't other symptoms (wheel out of true, stiff axle, issues with coasting, etc), then perhaps don't need to worry about it.
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Old 02-13-20, 07:17 PM
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Originally Posted by bonsai171 View Post
Took my cassette off to clean, and re-installed. Now the gears seem to shift side to side when I spin it. Is that normal?

Dave
Hyperglide teeth are shaped in a way that appear to wave back and forth when you spin the cassette around. If there isn't anything obvious blocking the cassette or lockring from seating straight you're probably fine.

FYI: If this is a 7-speed hub, it does not need any spacers behind the cassette.
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Old 02-13-20, 08:14 PM
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Originally Posted by ThermionicScott View Post
Hyperglide teeth are shaped in a way that appear to wave back and forth when you spin the cassette around. If there isn't anything obvious blocking the cassette or lockring from seating straight you're probably fine.

FYI: If this is a 7-speed hub, it does not need any spacers behind the cassette.
It say HG on the lockring. I put the spacer back in since the LBS installed the cassette that way a few years ago. Will it make any difference leaving it in?

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Old 02-13-20, 09:48 PM
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Originally Posted by bonsai171 View Post
It say HG on the lockring. I put the spacer back in since the LBS installed the cassette that way a few years ago. Will it make any difference leaving it in?

Dave
As long as the lockring can engage enough threads in the freehub body, it shouldn't be a problem. But any spacers behind the cassette eat up clearance between the smallest cog and the dropout. I never use any spacers behind my cassettes.
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Old 02-15-20, 05:28 PM
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A bit of runout in tha cassette (or feeewheel) is normal. Note the upper pulley on many derailleurs and see how much it will move side to side to compensate for the slight runout of some cassettes. That allows the derailleur to stay be in tune while the sprocket wobbles a bit.
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