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  1. #1
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    Campy 9 speed gearing options?

    I have a Campy 9 speed 11-25 rear cassette. Does anyone sell a 28 sprocket to replace the existing 25 without buying a whole cassette?

    I tried Harris, they had one to fit a 10 speed but no 9 speed 28 tooth cog. Seems the 9 speed and ten speed freehubs are different.

    Any help is greatly appreciated.

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    Quote Originally Posted by PVFD304 View Post
    I have a Campy 9 speed 11-25 rear cassette. Does anyone sell a 28 sprocket to replace the existing 25 without buying a whole cassette?
    Miche.

    I tried Harris, they had one to fit a 10 speed but no 9 speed 28 tooth cog. Seems the 9 speed and ten speed freehubs are different.
    It'll fit and you shouldn't notice the .002" difference in cog thickness (1.7 vs 1.75mm).

    9 and 10 speed freehubs have the same spline pattern so cassettes interchange.

    Steel 8 speed freehubs have a larger inside diameter on the splines and won't take 9/10 speed cassettes. They're 1mm narrower too.

    "Record Titanium" 8 speed alloy freehubs are their own thing with the 9/10 speed diameters but missing the step on one of the wide splines and take a little grinding on 9/10 speed cogs to make them fit.

    Record/Chorus from 1999 on and everything else 2000 and newer take a 27x1mm lock ring.

    9 speed hubs from before then take a 26x1mm lock ring.

    8 speed hubs take a 29x1mm lock ring.

    Also note that you'll be exceeding the wrap (27T) specification on a Campagnolo short cage derailleur (55mm between pulley bolts vs 72.5 for a medium and 89mm for a long) and may end up with a slack chain on the inner ring and smallest cog(s).
    Last edited by Drew Eckhardt; 08-17-11 at 02:24 PM.

  3. #3
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    Mine is a Veloce. It is a 1998 model. Harris emailed me and said it would not fit.

    ???

    I was hoping for a quick was to help lower my gearing for hill climbing. Sounds a lot cheaper option than a compact crank.

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    Quote Originally Posted by PVFD304 View Post
    Mine is a Veloce. It is a 1998 model. Harris emailed me and said it would not fit.
    They're wrong on the cog fitting your freehub unless you're having some confusion involving the "9" key on your keyboard.

    Your original post says "9 speed." If that should have been "8 speed" the cog won't fit.

    This post says "1998" at which time Veloce was 9 speed (Mirage/Avanti were not). If that should have been "1997" the cog wouldn't fit because only Record/Chorus made the transition.

    Obviously, the substitution won't be possible on Chorus/Record Mk II cassettes that have the last 2-3 cogs on an alloy carrier although I don't think you have a Campagnolo cassette where the options probably lack 11-25 9 speed with the options being 11-21, 11-23, 12-21, 12-23, 13-23, 13-26, and 13-28.

    I was hoping for a quick was to help lower my gearing for hill climbing. Sounds a lot cheaper option than a compact crank.
    Personally I'd scavenge parts off E-bay (derailleurs and crankset which are inexpensive due to people preferring compact cranks. Your left ergo lever will run a triple using 7 out of the 12 possible clicks) and run triple (I used 50-40-30x13-14-15-16-17-18-19-21 in the 8 speed era living in the Colorado Rockies.). I've even seen NOS Record Triple cranks that are prettier than a 28 cog for around $100 Buy-It-Now.

    30x25 is like 39x33, you'll still have a 39 - 42 ring for cruising on flat ground, and you'll retain the same cog spacing. If you still need to go lower you can use a granny ring down to a 24 although a chain catcher would be prudent.
    Last edited by Drew Eckhardt; 08-17-11 at 03:35 PM.

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  6. #6
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    Quote Originally Posted by PVFD304 View Post
    That's a 9/10 speed Campagnolo cog (same spline pattern).

    The issue would be whether the spacers and whatever Miche does to their "final" position cogs result in acceptable spacing and shifting. Officially their cogs aren't compatible with other cassettes.

    Campagnolo 9/10 speed loose cogs are no different for the largest position versus somewhere else on the cassette, although shift ramp location relative to the index spline is different with "correct" combinations shifting faster than "incorrect" ones.

  7. #7
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    Theres a <C> made freehub driver assembly to use Shimano type cassettes 9 speed.

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    Quote Originally Posted by fietsbob View Post
    Theres a <C> made freehub driver assembly to use Shimano type cassettes 9 speed.
    The freehub/axle/bearing setup used on all 8 speed hubs, all 1997-1998 9 speed hubs, and 1999 9 speed hubs except Chorus/Record is different from that used on the three hub varieties for which Campagnolo (and Fulcrum) makes/made Hyperglide freehubs (2000+ Veloce/Mirage and 2007 Centaur with cartridge bearings; 1999-2006 Centaur/Daytona/Chorus/Record oversized aluminum axle with cub and cone bearings; and 2007+ Record which shares the earlier bearings but has a different configuration on the freehub end).

    If the cog doesn't workout well viable fixes yielding lower gears without rebuilding the rear wheel are

    - 10 speed rear derailleur, 10 speed cassette (Campagnolo makes a 13-29 cassette and Miche loose cogs + spacers can be assembled in any configuration. About $45 for a NOS loose-cog Veloce cassette with nickel-chrome plated cogs), upgrade to 10 speed shifters.

    You may need new shifters or may be able to change internals around - 1998 was a transition year with the old shifter bodies but Athena and below seem to share the same year 9 speed internals apart from the pivot shaft.

    - Triple. A 2000 and older 9 speed long cage rear, 8 or 9 speed triple front derailleur, and triple crankset won't cost too much.
    Last edited by Drew Eckhardt; 08-23-11 at 06:00 PM.

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