How big a back cog with Campag 11 speed Chorus?

Not that this answers the original post but isn't it great now after all these years that with the introduction of shimano 11speed , campag and shimano & sram wheels / cassettes are compatible. I have shimano and campag wheels and drivetrains and they all work perfectly with each other. The main bonus is you can use cheaper shimano cassettes as the cheapest campag is chorus which is £50 more than an ultegra 11 speed.

If you are very careful with the chain length then you can get an 11-32 on the back.

2015 Chorus RD with a shimano Ultegra 11-32 on a Mavic wheel.

50-32

34-11

It looks worse than it is but the chain is about 5mm clear of the upper jockey wheel and when are you ever going to run small/small?

I'm running a 28 tooth as the biggest sprocket in the cassette on the Bianchi. The short cage set up will just about take a 30 tooth, but I wouldn't fancy it. Anything bigger will need a long cage rear mech.

Manual says no, but You could probably squeeze it, biggest issue is the ratio of large to small and how much chain wrap the short cage can take or you end up with a slack chain.

It's worth a try, even if yo can borrow a shimano wheel with the same cogs and see if can shift up and down the limits OK.