double to tripple

[DebW]

Large jump? How do you mean? for the double? Why would the compact require a larger jump than the classic double?

I did not need to exchange mine. I would have had to for the triple I think. It still works smooth, smoother than boyfriend's 105 he says.

From the Campy website, the Campy Centaur or Chorus front derailleur specs:

for double standard crankset - capacity 15 - max. chainring 54 - min. chainring 39

for compact double crankset - capacity 16 - max. chainring 50 - min. chainring 34

Alpinerabbit, what size chainrings does your compact double have? I don't doubt that the standard front derailleur would work fine with a compact, but Campy has apparently designed something that works EVEN BETTER with a compact. The difference is in the inside plate of the cage. The capacity in teeth is misleading because the chainring diameter difference would be more noticable in radius.

[Mags...]

Shimano's compact does not come with a bottom bracket.

That's interesting... I read on Shimano's website in their product specs that the unit includes a bottom bracket (integrated). Then when I was looking at buying it on a few online sites, several mentioned 'does not include bottom bracket'. Well I checked again, the Shimano site said it did. I phoned up my LBS and asked them how much etc and asked them whether we'd also need to buy a bottom bracket. He checked and said it was included. So now I'm totally confused.

Would you happen to know if the unit you installed was a R700? As far as I can see they only do one, which is fine for both Ultegra and DuraAce.

My bike is totally DuraAce groupset. I was hoping that if it the compact unit doesn't include the bottom bracket, then the bb I have on the bike - a Hollowtech II double crank - will hopefully work perfectly fine on the Hollowtech II compact crank. Is this unrealistic?

Did you have to replace the chain because the bike was 9sp? or is that something that would need to be done regardless.

Thanks....