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Problem with dropping my chain on my Chorus 10 setup.(7 posts)

Problem with dropping my chain on my Chorus 10 setup.Helduser
Apr 22, 2002 9:43 AM
I have a chorus 10 setup and I've been managing to drop my chain when going from 53x21 or 53x19 to 39x21 or 39x19. Is there an adjustment I should make to the front derailleur to avoid this problem or should I just not try to drop into 39 when I'm in 21 or 19 on the rear?

re: Problem with dropping my chain on my Chorus 10 setup.curlybike
Apr 22, 2002 12:05 PM
Make sure that the inside adjustment for the Front Der(FD) is set so the chain just barely does not rub on the 39-21. There is a product called Jump stop that works when all else fails.
re: Problem with dropping my chain on my Chorus 10 setup.roadcyclist
Apr 22, 2002 4:34 PM
I have the same set-up and have NO problems at all. Gotta be a front der. adjustment. If you don't have the paperwork that came with the component, check Campy's website.
re: Problem with dropping my chain on my Chorus 10 rider
Apr 23, 2002 3:33 AM
Have same problem on my MTB. I had to drop my front derailer to allow a 42 tooth chainring. I know this sounds stupid, but check the derailer alignment before playing with the limit screws.

you wouldn't believe how just a hair off makes the whole alignment a pain in the butt. After your convence the alignment is right then adjust the limit screw on your big cog (21 I believe in your post) to not rub the inner front derailer.

I had to readjust mine and I quit dropping my chain on my MTB when dropping to the granny gear.

I only been riding for 13 years and had 15 bikes. Everytime I build a new bike I make an adjustment to the limit screw to find out I didn't have the derailer lined right. My point is start trouble shooting with the basics before playing with the limit screws.

Hope this helps,

re: Sounds like the f der is pivoted.dzrider
Apr 23, 2002 12:40 PM
Check that the sides of the cage are parralel to the chain rings.
Cruddy Italian Parts!grzy
Apr 23, 2002 3:58 PM
Well, not really, but they do require some careful setup.It could be as simple as setting the lower limit screw or getting the outer cage plate of the front der. parallel to the crank. My guess is that this requires some finesse and experience to nail it - you may want to get a friend to show you some of the tricks or else take it to a LBS. Even then it's no guarantee that they'll get it right.
re: Problem with dropping my chain on my Chorus 10 setup.DKF
Apr 24, 2002 1:43 AM
I had the exact same problem and solved it by simply reducing the front der. travel to the very, very bare minimum, much more so than my prior 9spd.