gcasillo

I've had a Campagnolo Veloce 10 group for about a full year now, and I'm having a problem with the chainrings flexing substantially. As a consequence, the chain is rubbing against the front derailleur unless it's pretty much in the center of the cassette (16t or 17t cogs).

Mine is an all-alloy crankset in black like this:



I have the Veloce front derailleur that came with the group, and it supposedly should work with standard and compact (CT) cranksets. I have a compact. FWIW, I've used a compact-specific derailleur before with a Record 10 group a couple years ago.

Anybody with a Veloce crankset having similar issues? Does a Centaur 10 crankset have better chainrings or would I need to step up to Chorus or Record? Would a compact-specific derailleur help?

SalsaPodio

You could trim the FD.

AngryScientist 

i'd be willing to put money on you not having "chainring flex".

are you sure your BB set-up is correct, and you dont have any bent teeth on the chainrings?

as mentioned, you should be able to trim the fd to avoid any chain rub with any campy-10 set-up, i think you have a set-up issue, chainring flex is not to blame, fo sho.

scotch

+1. i ride 2007 Veloce and have never had this problem. my guess is it's the FD alignment/rotation.

Homebrew01

I agree with all the above. On almost any bike, as you sift up & down the cassette, you have to make small adjustments (trim) in the fd to prevent rubbing. Or you can buy Shimano Di2 which does it automatically. The other possibility is that your crankset is loose.

noonito

Check that all the chainring bolts are tight. I thought my chainring was flexing, and it turned out that a couple of the bolts were loose.

stien

Check FD setup, rotational like someone said or the adjuster screw isn't far enough out. Or you're just not trimming.

gcasillo

Definitely know how to trim. One of the reasons I've enjoyed Campy setups over the years.

I agree that it probably isn't the chainrings. It's just too pronounced. So much so that no amount of trimming can remedy it. It's most likely FD placement. I'm going to give it a look tonight and see if I can get it dialed in.

AngryScientist 

if you have a trainer, pedal and max resistance with someone behind the bike, looking to see if the chainring moves side to side. that could be indicative of loose chainring bolts or bottom bracket issues. if it doesnt move, than likely as you said, a fd problem.