double to tripple

[TsPoet]

Thanks, the replies were what I expected, not what I'd hoped, but what I expected. At least there is maybe the option of going to a compact.
I also appreciate no one pointing out that I can't spell triple.

[bike4ever]

We put a compact crankset on a customers bike recently. He was moving from a traditional Dura Ace 9spd double. All we changed was the crankset, bottom bracket, and new chain. Shimano's compact does not come with a bottom bracket. We made minor adjustments to the front derailleur. Everything works great.

[alpinerabbit]

Worked for me except I had to do the painful step from Campagnolo Chorus classical double crankset to a Centaur compact. The Chorus only comes in carbon (too pricey)

Works fine for me and my hill performance has vastly improved.

[DebW]

I was perusing the Campy website recently and saw that they make a front derailleur specifically for compact double cranksets. It may not be absolutely necessary, but it had a specific design to handle the large jump smoothly.

[alpinerabbit]

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.

[Susie]

My brand new (well 2.5 month old bike) was destroyed last month in an accident. That bike had a compact double on it (Campy Record, if that matters). I picked up the replacement bike at the shop on Saturday. Because of a knee injury from the accident, I went to a triple this time (still Campy Record). It required a different front derailer, a different rear derailer that was a little longer since the chain would have a larger range of motion to deal with, and a longer chain. So, except for the brakes and levers, everything else was different. It did add .6 pounds to the weight of the bike (everything else is identical to the old bike). I would expect that weight difference to be bigger with other component groups, since Record is about the lightest out there.

That all I know on the subject,

Susie

[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....