Chorus 10 speed Rear Derailleur - max teeth

Greeting to the forum!

I have joined a group ride recently during which I have realised that my compact chainset (50/34) with my rear cassette (11-25) are not giving me the range I need (for my level of fitness).

I want to get an 13-29 cassette (don't seem to be able to find a 13-28) but I am not sure if my RD (pictured below) can handle the range. I believe I have a Chorus 10sp short cage which per Campagnolo can handle up to 26T.

Does anyone have a clue if it will work in practice??
If not any ideas on how to solve this without spending a small fortune??

Feel free to offer for sale cassettes and RDs if you have any going spare!

Cheers

George

There are ppl who used it and dident have any probs. But like you say its beyond the listed capacity for short cage.
http://forums.roadbikereview.com/components-wrenching/campy-13-29-short-cage-rear-derailleur-5207.html

You could always put up a trade thread..

cheers mate!
Does anyone actually know how to figure out if it is medium or short cage (are the lengths listed anywhere online)??
It seems that the record medium can go up to 29T with a double chainset.

You need to measure the distance between the jockey wheels 55mm=short 72.5mm=medium

55, 72,5 och 89 those are short to long and its the distance in mm between the center of both pulleys.

Google is worth a try .. :)

Unfortunately its short !!!

Also most centaur 10sp cassettes I can find online are either 27t or 30t!

Google is worth a try .. :)

no, its not as good as LFGSS :)

Jokes aside its not always straight forward how to search for this things (i.e. how to write the search)!

I will post a wanted and a trade thread to see of anything comes up!

I bought a 13-29 veloce just days ago. Doubt youd be able to tell a diff from centaur.

It will add a few grams but the price is very sensible!
I posted under Wanted and under Component sales for a replacement RD.
I am guessing I will be needing a longer chain as well!

I've run a 13-29 with a short cage chorus 10sp mech. Absolutely no problems on my bike with standard chain rings up front. So, I'd think that, unless you have mega long chain stays, you shouldn't have any probs.

And, as you're getting the casette anyway, you may as we'll try it before splashing out on a new mech too!

I've run a 13-29 with a short cage chorus 10sp mech. Absolutely no problems on my bike with standard chain rings up front. So, I'd think that, unless you have mega long chain stays, you shouldn't have any probs.

And, as you're getting the casette anyway, you may as we'll try it before splashing out on a new mech too!

Thanks for the feedback!

Were you ever using the large ring in the front with 29T in the back??
If my chain is optimised for my current setup (was installed by my LBS) should I be buying a new chain as well?
Would you by any chance have the cassette available to sell :)

I ride with a mate who has the same era record short cage and a 29t cog. It works in practice but it pulls the jockey wheels almost horizontal In big big cogs which looks a bit odd. Not seen him have any issues from it though.

I am guessing that the reason why so many people chose to go for this unorthodox setup is the ridiculous cost of a new chorus/records 10sp rear derailleur.

A 10 sp chorus RD/cassette and chain would cost more than an 11sp ultegra group (and I am not trying to suggest that the two are equal...nor I am trying to get the good old campag vs. shimano debate going again)

A sub 300 ultegra group?

Thanks for the feedback!

Were you ever using the large ring in the front with 29T in the back??
If my chain is optimised for my current setup (was installed by my LBS) should I be buying a new chain as well?
Would you by any chance have the cassette available to sell :)

It'll run big cog to big sprocket just as well as with the 11-25 block (just try not to do that 'cos the chain is better running as straight as possible).

Try it with your current chain first - it might be fine.

Not for sale, sorry.

Cheers Dave! Will probably give it a go!

I ve been going back and forth on this one due to the high costs involved in doing it properly. I feel that it doesnt make much sense to be investing further in a 10 speed group.

I also don't fancy the idea of an over-stretched RD.

I am wondering whether this could give me sufficient/acceptable gear range:
http://www.ebay.co.uk/itm/Campagnolo-Centaur-12-27-Cassette-10-speed-latest-lighter-type-alloy-carrier-/321103449070?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item4ac341cbee

I am guessing it will also work ok with the Compact chainset and the short RD.

I guess I will only be able to answer this one if I buy/install the cassette and I climb the same mountain that killed me last time (with the 11-25).

Why don't you change your chainring from a 50t to a 48t instead?

It'll mean that you spend a little more time near the middle of the cassette at your idea cadence rather than cross chaining.

Other solution is to just get a Veloce cassette and derailleur, you'll be hard press to notice the difference between that and the Chorus part.

Cheers Ed

So 48 chainring with the 13-29 at the back! I am wondering whether it will limit the top speed.

This is the gain ration of my current setup per Sheldon Brown

8.0 5.4
7.4 5.0
6.8 4.6
6.4 4.3
6.0 4.1
5.6 3.8
5.0 3.4
4.6 3.1
4.2 2.8
3.8 2.6

This is the current setup with 12-27

8.0 5.4
7.4 5.0
6.8 4.6
6.4 4.3
6.0 4.1
5.6 3.8
5.0 3.4
4.6 3.1
4.0 2.7
3.5 2.4

This is the 48/34 with 13/29

7.1 5.0
6.6 4.6
6.1 4.3
5.7 4.1
5.4 3.8
4.8 3.4
4.4 3.1
4.0 2.8
3.5 2.5
3.2 2.2

How often do you ride on 50/11? (or 50/12 for that matter)

Not often I have to admit. Mostly when descending!

Exactly, plus the chainring change the ratio of the entire cog rather than a couple of bigger cog on the cassette.

The new Campagnolo derailleurs pull a 30 T sprocket, the older ones like yours only a 26, regardless of the cage.