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Is a deore freehub body compatible with an untegra hub?

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Is a deore freehub body compatible with an untegra hub?

Old 12-25-09, 06:29 PM
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KtotheF
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Is a deore freehub body compatible with an untegra hub?

A friend gave me a pair of wheels with ultegra hubs, but the rear is missing the freehub body. They're fairly modern wheels, they had a 9 speed cassette on them I believe.

I saw this freehub body on ebay: https://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWAX:IT
Seems like a pretty good deal, $25 and free shipping, but will it fit?
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Old 12-25-09, 06:33 PM
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Most likely no.

You need to specify *exactly* which ultegra hubs as well if you want an answer.
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Old 12-25-09, 06:42 PM
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Really? Dang, that sucks. I thought I was pretty safe since Sheldon said:

Virtually all Shimano freehub bodies are interchangeable. The exceptions are:
  • Very early freehubs (identifiable by the absence of the typical bulge on the right end of the hub barrel) which have non-interchangeable bodies.
  • Hubs that use the new "silent clutch" mechanism.
  • Pre-1997 Dura-Ace freehubs, which only take pre-1997 Dura-Ace bodies.
I'm visiting family right now, so I can't tell you exactly what model hubs they are.
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Old 12-25-09, 07:44 PM
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Old 12-25-09, 09:02 PM
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Originally Posted by KtotheF View Post
Really? Dang, that sucks. I thought I was pretty safe since Sheldon said:



I'm visiting family right now, so I can't tell you exactly what model hubs they are.
Even within groups, there can be incompatibility. You need to know the model number of the hub to order a freehub body, not just the group level.
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Old 12-25-09, 09:03 PM
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Originally Posted by KtotheF View Post
Really? Dang, that sucks. I thought I was pretty safe since Sheldon said:
And he's wrong.
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Old 12-25-09, 09:45 PM
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Old 12-26-09, 11:30 PM
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Originally Posted by operator View Post
And he's wrong.
Too true. There's a basic incompatibility between "road" cassette bodies and "mountain" cassette bodies. The "mountain" hubs have a slight recess in the hub that the cassette body fits into. If you put a "road" body on a "mountain" hub, the body will fit, but the cogs will end up too close to the spokes and the derailleur will rub on the spokes.

I had this exact issue crop up last summer due to an on-tour emergency cassette body replacement. It left me without my big cog- but by then we were done with the most extreme climbs. I made it home OK.
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Old 12-26-09, 11:42 PM
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I can tell you a tiagra FH-4400 freehub body will work perfectly on a 600-ultegra FH-6401 freehub, even the dust caps match up.

if it's a FH-6500 ultegra freehub, then you can use a FH-5500 105 freehub body, since they're interchangeable, but they all cost a similar amount anyways.
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Old 12-27-09, 08:22 AM
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One other issue you may have is that the right dust cap my not fit well with the freehub you are buying. I usually buy a NOS hub on Ebay for about the same price as just a freehub body. Then I scavange any needed parts to make it fit. I also end up with a spare axle and a set of new bearings.
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Old 12-27-09, 08:26 AM
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Originally Posted by operator View Post
And he's wrong.
Keep in mind that Sheldon had hundreds of pages of stuff on his website and it's a moving target because things gradually change. Even when he was still alive he couldn't keep everything accurately updated. As time goes by, more of his technical data is going to become dated and inaccurate.

He was still a cool guy. I had the opportunity to exchange messages a couple of times when I disagreed with him. Regardless of which of us was right, he always responded as a gentleman.
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Old 12-27-09, 08:50 AM
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There's a basic incompatibility between "road" cassette bodies and "mountain" cassette bodies. The "mountain" hubs have a slight recess in the hub that the cassette body fits into. If you put a "road" body on a "mountain" hub, the body will fit, but the cogs will end up too close to the spokes and the derailleur will rub on the spokes.
The opposite substitution seems to work, i.e. "road" freehub bodies are usable on MTB hubs. I upgraded a 7-speed Deore LX hub to 8-speed using an older 105 freehub body and it works fine. I did have to use the 105's cone and dust cover but everything lines up and it shifts to all cogs with no interference.
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Old 12-27-09, 04:32 PM
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Originally Posted by HillRider View Post
The opposite substitution seems to work, i.e. "road" freehub bodies are usable on MTB hubs. I upgraded a 7-speed Deore LX hub to 8-speed using an older 105 freehub body and it works fine. I did have to use the 105's cone and dust cover but everything lines up and it shifts to all cogs with no interference.
That's the situation that I was saying caused me problems, but it was a newer 8/9 speed road cassette body on an old Deore XT hub shell. I think Shimano may have made slightly different interfaces between the hub and cassette body over the years- even with a large pile of parts, I'm still not entirely sure what works where.
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Old 12-27-09, 07:16 PM
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Originally Posted by Jeff Wills View Post
That's the situation that I was saying caused me problems, but it was a newer 8/9 speed road cassette body on an old Deore XT hub shell. I think Shimano may have made slightly different interfaces between the hub and cassette body over the years- even with a large pile of parts, I'm still not entirely sure what works where.
Sorry, I didn't read your posting carefully enough and you indeed were describing problems with the same swap I found satisfactory. My LX hub was on a '93 Trek and the road freehub body was from an 8-speed era 105. Anyway, mine has worked.
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Old 12-27-09, 11:08 PM
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Originally Posted by HillRider View Post
Sorry, I didn't read your posting carefully enough and you indeed were describing problems with the same swap I found satisfactory. My LX hub was on a '93 Trek and the road freehub body was from an 8-speed era 105. Anyway, mine has worked.
Ain't no big thing. In any case, I think there's a subtle difference between the LX and XT hub shells and the "correct" cassette bodies.
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Old 12-27-09, 11:27 PM
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Originally Posted by Retro Grouch View Post
Keep in mind that Sheldon had hundreds of pages of stuff on his website and it's a moving target because things gradually change. Even when he was still alive he couldn't keep everything accurately updated. As time goes by, more of his technical data is going to become dated and inaccurate.

He was still a cool guy. I had the opportunity to exchange messages a couple of times when I disagreed with him. Regardless of which of us was right, he always responded as a gentleman.
I understand that

His pages are rapidly becoming outdated unfortunately.
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Old 12-28-09, 01:31 PM
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Out of ignorance I put a 9 speed mtb cassette (unknown brand and model) on a Bontrager rear road wheel and has worked fine so far. I probably only have about 500 miles on it though.
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Old 12-28-09, 02:29 PM
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Why not ask the guys at Loose Screws?

https://www.thethirdhand.com/index.cg...d=122538015509

For $10 -- I see $35 on their website and you quoted $25 -- I'd rather get the right part.
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Old 12-28-09, 03:19 PM
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Originally Posted by dit View Post
Out of ignorance I put a 9 speed mtb cassette (unknown brand and model) on a Bontrager rear road wheel and has worked fine so far. I probably only have about 500 miles on it though.
Yes that works but it's not the issue in this thread about freehub bodies.
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