On Sunday, August 12, 2018 at 4:02:15 PM UTC-7, AMuzi wrote:
On 8/12/2018 4:31 PM, wrote:
On Sunday, August 12, 2018 at 8:01:31 AM UTC-7, AMuzi wrote:
On 8/11/2018 4:29 PM, wrote:
I expect that Muzi knows the answer to this one:

Is there any mechanical advantage difference between a 10 speed and 11 speed
Campy rear derailleur?


Yes and the (discontinued) Athena 11 is different again from
both groups. Annoyingly, front changer leverage/cable travel
changed as well.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971

Thanks Andrew.

That means I have to use 10 speed derailleurs with 10 speed levers even though it would be cheaper to get 11 speed derailleurs. Or a 9 speed derailleur but those are even harder to come by.

Good thing I've decided to disassembly my 62 cm Eddy Merckx Corsa Extra and sell the frame/fork and keep the 10 speed parts for spares. Also I have two or three Campy Triples I have to sell off to make more space.


Front doubles in '9 speed' boxes are still plentiful and
cheap, not different in any way from the later '10 speed'
marked changers except the lettering.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971

The compact front derailleur on the 9 speed is completely different and doesn't work very well compared to 10 speed compact front derailleur. Granted the "standard" fronts are the same.


On both the 9 speed front compact and standard I would always use a Deda Elementi Dog Fang to stop a dropped chain when moving to the smaller ring but you can't do that with my new Colnago because the seat tube is teardrop shaped.