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10 speed hub compatibility

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10 speed hub compatibility

Old 03-18-08, 09:37 AM
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kpfeif
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10 speed hub compatibility

Hi mechanics,

I recently bought a 10sp DuraAce hub laced to an open pro rim to use on my light touring build. I might be in over my head though, because while I initially thought that a 10 speed hub would also be compatible with a 9 speed cassette (I want to use an XT 11-34 cassette), I'm looking closer online now and it seems that the FH7800 hub is only compatible with CS-7800 or CS-6600 10 speed cassettes. Does anyone have experience with this problem? If not, does anyone want to buy a 36 spoke dura ace/open pro wheel?
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Old 03-18-08, 09:52 AM
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Should've searched better: FYI the answer is no. http://www.bikeforums.net/archive/in.../t-160364.html

Crap.
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Old 03-18-08, 10:35 AM
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Right, the FH-7800 10-speed Dura Ace hub has an Al freehub body so the splines are taller to prevent notching from the cassette. The upshot is that they accept ONLY 10-speed cassettes. I see E-bay or Craig's list in your future unless a 12x27T 10-speed cassette is large enough.

BTW, next year's Dura Ace hubs are going back to Ti freehub bodies and will accept 9-speed cassettes as well as 10-speed.
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