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Campagnolo 9/10-speed cassette compatibility question

Old 11-01-16, 12:13 PM
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gaucho777 
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Campagnolo 9/10-speed cassette compatibility question

Is it possible to remove one cog from a Campagnolo 10-speed cassette and use with 9-speed spacers and a Campagnolo 9-speed drivetrain? Or are not all the cogs loose? My current cassette is a 9-speed 13-23t cassette, all loose cogs, on a 10-speed hub. However, I need lower gears to get my slow, heavy self up the hilly terrain where I live. Ideally, I'd like a 29t low gear which I see offered with some of the newer 10-speed cassettes, but I'm not seeing a 29t available with 9-speed cassettes. So, again, can I use a 10-speed cassette as a 9-speed by mixing cogs and using 9-speed spacers, or should I just get a Veloce 9-speed Ultra-Drive 13-28t cassette and be done with it?

I do have a 10-speed medium-cage Chorus RD, so capacity isn't an issue for the 29t cog.

Thanks in advance.

FWIW, the cassette hub looks like this:

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Old 11-01-16, 12:34 PM
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Originally Posted by gaucho777
Is it possible to remove one cog from a Campagnolo 10-speed cassette and use with 9-speed spacers and a Campagnolo 9-speed drivetrain?
Veloce cassettes are all loose. Most Daytona and Centaur year/cog combinations have the final pair on carriers, although 14-23 is always loose and a few years had all loose cogs. Chorus and above have the last two or three pairs on carriers.

Your biggest problem is going to be the final cog (or pair) offset so its teeth are past the spline ends. You'd need custom spacers on the front and back sides unless you omit the final cog, leaving you with a 26 big cog that's not ideal for your purposes.

Shifting between mis-timed cogs also does not work as well (I was not impressed with the 13A 14B combination I tried in the 8 speed era), although you could choose to lose the 13, replacing the 14A second position cog in the 13-29 cassette with a 14A first position.

With those problems I'd pass.

My current cassette is a 9-speed 13-23t cassette, all loose cogs, on a 10-speed hub. However, I need lower gears to get my slow, heavy self up the hilly terrain where I live. Ideally,
Install a triple crank. 30x23 is like 39x30, and 26x23 like 39x35 although your cogs still run 13-14-15-16-17-18-19-21-23.

Your left shifter will run a triple front derailleur, and medium cage derailleurs are officially sufficient for all cassettes on triples except the 13-29.

So, again, can I use a 10-speed cassette as a 9-speed by mixing cogs and using 9-speed spacers, or should I just get a Veloce 9-speed Ultra-Drive 13-28t cassette and be done with it?
The 13-28 9 speed cassette will be simpler and shift better than a 10 speed cassette missing a cog in the middle.

Last edited by Drew Eckhardt; 11-01-16 at 01:33 PM.
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Old 11-01-16, 01:48 PM
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@Drew Eckhardt, Thanks for the helpful and informative reply. The suggestion of going with a triple is a good one, though I'd rather not spend he extra money on a new crankset and BB spindle at this time. Something to consider in the future though. Thanks again.
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Old 11-02-16, 01:08 PM
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Originally Posted by gaucho777
Is it possible to remove one cog from a Campagnolo 10-speed cassette and use with 9-speed spacers and a Campagnolo 9-speed drivetrain?
You can use the cogs; the difference in width of the cogs is insignificant. The difference between 9 and 10 speed spacing is almost all in the spacers.

Exceptions: the smallest cogs with built-in spacers - obviously. Or the biggest cogs attached by carriers; these are only on the premium cogsets. Finally, the final (largest) cog in all 10-speed setups is cantilevered somewhat into the spokes. You may be able to adapt this to work on a 9-speed setup, but you'd have to do some careful work modifying the final cassette spacer.

My recommendation: Miche sells a 13-28 9-speed cassette for less than $40 - online. Adding a triple involves a whole bunch of cost and mods.
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Old 11-02-16, 03:34 PM
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Originally Posted by Dave Mayer
You can use the cogs; the difference in width of the cogs is insignificant. The difference between 9 and 10 speed spacing is almost all in the spacers.

Exceptions: the smallest cogs with built-in spacers - obviously. Or the biggest cogs attached by carriers; these are only on the premium cogsets. Finally, the final (largest) cog in all 10-speed setups is cantilevered somewhat into the spokes. You may be able to adapt this to work on a 9-speed setup, but you'd have to do some careful work modifying the final cassette spacer.

My recommendation: Miche sells a 13-28 9-speed cassette for less than $40 - online. Adding a triple involves a whole bunch of cost and mods.
That would have been my suggestion as well
Miche 9 Spd Primato Cassette Campagnolo - Cassettes - Ribble Cycles
BBB also makes a 9 speed Campagnolo compatible 9 speed cassette in the same combination available on the same site
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Old 11-02-16, 04:38 PM
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Because the Freehub driver Splines are aluminum, the cassettes all but the last ones Go on a cassette sub assembly
so as to Not dig into the Driver..

making-speed in high is not creating the torque load Climbing does
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Old 11-02-16, 05:04 PM
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Originally Posted by fietsbob
Because the Freehub driver Splines are aluminum, the cassettes all but the last ones Go on a cassette sub assembly
so as to Not dig into the Driver..
Campagnolo 9/10/11 splines are deep enough there's sufficient contact area to avoid cogs digging in provided the cassette is torqued to spec. Presumably Campagnolo learned from the pre-exadrive 8 speed alloy Record/Chorus freehubs which shared the shallow steel freehub spline pattern. Some after market hubs might not work as well - Campagnolo could use 7075 aluminum (aka Ergal, like they do on their rings) which is harder albeit more expensive than 6061, and select a harder temper like T6 or T651.

The cogs on carriers are there so Campagnolo can maximize profit by providing more levels for people willing to spend more, with weight the differentiating feature.

The first 9 speed cassettes going with the new spline pattern were all loose cogs, and only available in three levels - steel, big cogs titanium, all cogs titanium.

Varying what cogs get spacers helped increase that to 6 levels with hundreds of dollars separating heaviest from lightest.

They start on the biggest side because that's where the greatest weight savings justifying higher price tags are.

12-25 cassette weights and features are/were

270g Mirage/Xenon - all loose, galvanized
270g Veloce- all loose, nickel-chrome although some years were galvanized
250g Daytona renamed Centaur for copyright reasons - final pair on carriers except 14-23 and some years were all loose
230g Chorus - largest 6 (4 for smaller cassettes) cogs on carriers
200g Record - largest 6 (4 for smaller cassettes) cogs on carriers, 4 largest cogs are titanium
160g Record Titanium - largest 6 (4 for smaller cassettes) cogs on carriers, all cogs titanium except steel 11T first position cogs

Last edited by Drew Eckhardt; 11-02-16 at 05:30 PM.
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