Question: Campy 9/10 speed compatibility
 

Hi,
Is there any specific reason why a campy 10s group would have a problem working with 9s derailleurs?Parts: Veloce 10s cassette, Veloce 10s controls, 10s large chainring 52t, 9s small chainring 39t, 10s chain (with correct sprocket spacing), and Mirage 9s front/rear derailleurs.
Bike: Eddy Merckx Gara (non slopy)

Thanks.
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It works.

So do you reckon, that all the incomptibility stuff that is on campy web site q&a's is a load of?
They stated that the 9s rear deraileur is incompatible to the 10s group due to some reason
I couldn't understand.
It is understandable that there is a motive - they want to get ppl to repurchase 10s goods.

There is alot of BS, and CYA on the Campy site. If you do 'as Campy says' you won't go wrong and everything will be hunky dory,but there is alot of it that works just fine despite the party line.