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Campy 9/10 hub/cassette compatability problem

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Campy 9/10 hub/cassette compatability problem

Old 10-25-11, 08:19 PM
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-holiday76
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Campy 9/10 hub/cassette compatability problem

So i've been piecing together a Campy 9 speed setup for my Colnago for some time now. It's almost done but I might have hit a problem. I have:

a 10 speed rear wheel with a mirage 10 speed hub. The wheel came with a 10 sp cassette on it so I know that's what it is.

I purchased a brand new veloce 9 speed cassette. I went to install it onto this hub this evening only to find that the hub body seems to be a few mm's too short. The lock ring won't thread on. I made sure the cogs where on correctly and the spacers where all there.

Why the heck wouldnt a 9 speed cassette fit on a 10 speed hub? Something isnt adding up and I don't get it...

Any of you have experience with this stuff?
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Last edited by -holiday76; 10-25-11 at 08:27 PM.
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Old 10-25-11, 08:25 PM
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You sure the lockring diameter matches the freehub body? Try it without the cassette.
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Old 10-25-11, 08:27 PM
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Originally Posted by JunkYardBike View Post
You sure the lockring diameter matches the freehub body? Try it without the cassette.
yeah , i did that and it threads on fine. It just doesnt reach with the cassette cogs and spacers on there.
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Old 10-25-11, 08:32 PM
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Weird.
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Old 10-25-11, 08:59 PM
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Do you have the cassettes all with the tooth count facing outwards? Spacers in proper position? (they are position specific)

This is clearly operator error, you are doing something wrong if a 10 speed cassette fits and a 9 doesn't.
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Old 10-25-11, 09:18 PM
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what is the smallest gear on each cassette?
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Old 10-25-11, 09:40 PM
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Generally I'm with OFG - these have always slipped right on for me when everything is lined up the way it needs to be.
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Old 10-25-11, 09:45 PM
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Originally Posted by Road Fan View Post
Generally I'm with OFG - these have always slipped right on for me when everything is lined up the way it needs to be.
Are you trying to get yourself into trouble?
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Old 10-25-11, 09:55 PM
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I figured it out and it of course was indeed operator error. I thought I'd tried both lock rings but I hadnt (they look exactly the same..almost). I needed to use the 10 speed lock ring on the 10 speed hub. The 9 speed lock ring that came with the new cassette is a little less than one mm smaller in diameter and doesnt thread into the hub. Problem solved.

So if this is ever any help to someone, 10 speed campy lock rings dont thread into 9 speed campy hubs apparently. By the way, the 9 speed lock ring is marked as such where as the 10 speed lock ring has no indication with speed it came with.
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Old 10-26-11, 04:30 AM
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...and the wherabouts of the 10-sp cassette?
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Old 10-26-11, 07:33 AM
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Originally Posted by -holiday76 View Post
I figured it out and it of course was indeed operator error. I thought I'd tried both lock rings but I hadnt (they look exactly the same..almost). I needed to use the 10 speed lock ring on the 10 speed hub. The 9 speed lock ring that came with the new cassette is a little less than one mm smaller in diameter and doesnt thread into the hub. Problem solved.

So if this is ever any help to someone, 10 speed campy lock rings dont thread into 9 speed campy hubs apparently. By the way, the 9 speed lock ring is marked as such where as the 10 speed lock ring has no indication with speed it came with.
I'm a genius.

By the way, I think later 9 speed lockrings came in 27.0. Your "new" Veloce cassette must have been old stock with 26.0 diameter lockring threads.

Last edited by JunkYardBike; 10-26-11 at 07:38 AM.
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Old 10-26-11, 08:40 AM
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Originally Posted by RobbieTunes View Post
...and the wherabouts of the 10-sp cassette?
on my work bench. It's a 26 large tooth cog i think but it might be a 23. It would work nicely on the NC coastal plain...you have my email.
Originally Posted by JunkYardBike View Post
I'm a genius.

By the way, I think later 9 speed lockrings came in 27.0. Your "new" Veloce cassette must have been old stock with 26.0 diameter lockring threads.
that's probably why I got it for $50.
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