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Old 04-03-14, 10:28 AM   #1
kgaren
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Chorus 11 speed 11-27 cassette - Will it accept a 23-26-29

Hi,

Hopefully this has not been asked a thousand times, (could not find this in search)...

Does any one know if I can replace the 23-25-27 on the 11-27 11-speed Chorus (2014) cassette with a 23-26-29?

Thanks in advance

Karl

Last edited by kgaren; 04-03-14 at 10:52 AM.
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Old 04-03-14, 12:49 PM   #2
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You may just have to HTFU on those climbs.

triple crankSet .. ?

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Old 04-03-14, 04:14 PM   #3
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Campy's web site doesn't list an XXx29 tooth cassette in any of their 11-speed groups, the deepest they show is 12x27. Since the former 13x29 cassette seems to be available only as 10-speed, you probably can't make the 23/26/29 group work as the cog spacing will be wrong.
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Old 04-03-14, 04:43 PM   #4
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Campy's website doesn't seem to list XX-29 on the basic groupset pages, but other pages do: http://www.campagnolo.com/repository...ev00_07_13.pdf

That doc also lists the parts in the cassette (sprockets and spacers) which might answer the original question. A Google of e.g. "Campagnolo Chorus 12-29" suggests that XX-29 11-speed cassettes are quite widely available.

If I've misunderstood something I'd love to know, as I need to pick an 11-speed cassette myself.
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Old 04-03-14, 05:02 PM   #5
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Campy's website doesn't seem to list XX-29 on the basic groupset pages, but other pages do: http://www.campagnolo.com/repository...ev00_07_13.pdf

That doc also lists the parts in the cassette (sprockets and spacers) which might answer the original question. A Google of e.g. "Campagnolo Chorus 12-29" suggests that XX-29 11-speed cassettes are quite widely available.

If I've misunderstood something I'd love to know, as I need to pick an 11-speed cassette myself.
Yeah, the Campy instruction sheet you linked to does show a 12x29 11-speed cassette on page 7 of the .pdf and does specify a 29T as the largest available 11-tooth cog but it doesn't note the group or a part number. If a 12x27 11-speed is really available it's 23/26/29 group should be able to replace the 23/25/27 of the 11x27 cassette.

You should contact Campy USA to see if and where these cassettes are available.
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Old 04-05-14, 06:40 AM   #6
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Thanks everyone. I am going to give it a try and let you know if it works. Its actually going to be on a 53-39. Although I can get up 13+% hills with the 39-27, a 39-29 would make it a little easier especially at the end of a long ride.
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Old 04-05-14, 07:47 AM   #7
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Check this:

Dave Moulton's Blog - Dave Moulton's Bike Blog - More on Practical*Gearing
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Old 04-12-14, 06:25 AM   #8
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Thanks - Very helpful information. I installed the 23-26-29 on my 11-27 taking off the old one of course. It worked especially well after I put the spacer back between #8 and #9 cog. Shifts much better with that spacer ;-)
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Old 04-12-14, 07:01 AM   #9
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Good link but Dave Moulton should discover the difference between mm and cm. His bike's 10" bottom bracket height is 25.4cm, not mm. That error is repeated throughout his blog.

Anyway, several years ago I did something similar to convert a 12x27 Shimano 9-speed cassette to a more useful 13x27 by removing the OEM 12 and 13T cogs, replacing them with a first position 13T and adding a 16T cog with spacers. That gave me a 13,14,15,16,17,19,21,24,27 sequence and included the very useful 16T and deleted the useless (to me) 12T. The problem with doing that now is that Shimano 16T single cogs in either 8,9 or 10-speed form are nowhere to be had.
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Old 04-12-14, 07:15 AM   #10
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Yes you can buy the individual cogs for a Campy 10/11 speed and do this it will be pricey and difficult most dealers don't like to sell indy cogs.
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Old 04-12-14, 07:34 AM   #11
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Quote:
Originally Posted by kgaren View Post
Hi,

Hopefully this has not been asked a thousand times, (could not find this in search)...

Does any one know if I can replace the 23-25-27 on the 11-27 11-speed Chorus (2014) cassette with a 23-26-29?

Thanks in advance

Karl
I did that to my 12-27 11speed cassette... added those 23-26-29.. don't see why it would not work on an 11-27. Got the cartridge from ebay.
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Old 04-12-14, 03:40 PM   #12
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Let me also add, I used it today. Near the end of a 40 mile ride we came up on 13% grade. The 29 was extremely handy. Not sure if I would have gotten up it with the 27. This was on a double.
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