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Old 08-13-12, 10:14 PM   #1
rlorenz2
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Rear Hub compatibility

If I have a Dura Ace 7400 hub and cassette on my bike now and found a Campagnolo hub to match my front, could I just switch the cassette from the Dura Ace to the Campagnolo?

or could I put the freebody hub from the Dura Ace to the Campagnolo?


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Old 08-13-12, 10:35 PM   #2
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That would be too easy. You can see the threading on the end of the DA hub doesn't match the Campagnolo hub.

Btw, have you checked the axle length? the DA 7400 hub may be 126mm, but I suspect the Campagnolo hub is a later 130mm hub.
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Old 08-13-12, 10:58 PM   #3
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Yeah, sorry to say there is no interchangeability of cassettes, lockrings or freehub bodies. Rders and shifter aren't interchangeable, either, if you want the shifting to be indexed. Shimano hub = Shimano cassette, rder and shifter; Campy hub = Campy cassette, rder and shifter.

There are adapters out there to try to help to fudge the shifter/rder/cassette non-compatibility, but I don't know of any adapter that will allow you to interchange cassettes or freehub bodies between brands.
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Old 08-14-12, 03:20 AM   #4
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I seem to remember seeing sme cassettes that were splined for one company and spaced for the other i.e. Campy splines and Shimano spacing. That way you could interchange. Maybe somebody can remember who did this if it does exist.
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Old 08-14-12, 09:29 AM   #5
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So if I want to use that Campagnolo hub I need a campy cassette, rear derailleur, and shifters?

Would I notice any difference in the switch? from what I read Dura ace 7400 is not bad components by anymeans. I know there are fans of both companies just looking to have things match.

Currently my bike has Dura ace 7400 rear hub, cassette, rear derailleur, shifters, head set and bottom bracket. Campagnolo cranks, chain rings, front derailleur, seat post and front hub.
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Old 08-14-12, 10:22 AM   #6
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"Consistency is the hobgoblin of small minds" - Somebody Famous and Smart. Just keep the mis-matched hubs. What you have now work fine together. If you want stuff to match, It'd be a lot easier to just find a DA front hub.
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Old 08-14-12, 02:29 PM   #7
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There were a few companies who made 'conversion cassettes' I.E. Campy splines with Shimano spacing and vice versa. They are occasionally are found on EBay.
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Old 08-14-12, 09:13 PM   #8
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"Consistency is the hobgoblin of small minds" - Somebody Famous and Smart. .
My "Dream bike" will be beautifully consistent.
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Old 08-14-12, 09:32 PM   #9
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There were a few companies who made 'conversion cassettes' I.E. Campy splines with Shimano spacing and vice versa. They are occasionally are found on EBay.
I think PBK sells one of these under the name "ambrosio".
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Old 08-14-12, 10:00 PM   #10
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Originally Posted by rlorenz2 View Post
So if I want to use that Campagnolo hub I need a campy cassette, rear derailleur, and shifters? Would I notice any difference in the switch? from what I read Dura ace 7400 is not bad components by anymeans. I know there are fans of both companies just looking to have things match. Currently my bike has Dura ace 7400 rear hub, cassette, rear derailleur, shifters, head set and bottom bracket. Campagnolo cranks, chain rings, front derailleur, seat post and front hub.
If the bike currently has indexed shifting, and you want to maintain indexed shifting after switching to the Campy rear hub, the brand and spec of the shifter, rear der and cassette should match for best results. Front der and crankset generally don't matter, but rear shifter, rear der and cassette should match. Indexed shifting systems are generally not mixable across brands, though some folks manage to make it work.

If you switch to the Campy hub you should search for a Campy-splined cassette built with Shimano spacing. You could keep using your D-A rder and shifters that way. If you can't find a Shimano-spaced Campy-spline cassette, then you need a Campy-spaced cassette for the Campy hub. Your D-A rder and shifter will not index a Campy-spaced cassette reliably. So you'd need to change the rder and rshifter as well.

If you don't care about indexing and can friction shift, none of this matters.

Seems like an awful lot of work just to have matching hubs. Like jeirvine said, better to find a front D-A hub/wheel and match that way.
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Old 08-15-12, 08:32 AM   #11
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Another option is to re-space a campy cassette. I think you can get conversion spacers to narrow the cog spacing down so it would index with the DA RD. See here for specs:
http://sheldonbrown.com/cribsheet-spacing.html

Campy 8-speed spacers are 3.1 mm, and sprockets 1.9mm. Shimano 8 speed uses 3.0 and 1.8 respectively. So if my math is right, use 1.7mm spacers on a campy cassette to get the Shimano-indexable spacing. Then you'd need a spacer to take up the extra 1.4 mm extra space on the Campy freehub. This is off the top of my head math, so please correct me if I'm wrong. And NB that I have considered doing this a couple of times, but never taken the plunge.
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Last edited by jeirvine; 08-15-12 at 08:33 AM. Reason: grammar
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