Join Date: Sep 2005
Location: Essex, MD
Bikes: Ridley X-Fire (carbon, white)
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The "dropping" is probably more due to a maladjusted FD (limits) in conjunctuion with the trim adjustment. Also, problems could start to occur if the cable is ready to break.
If the FD is adjusted properly, then you may want to consider a "chain keeper". I use one on my TCR, especially when I switch to the compact crank where I seem to have more drops to the BB then when running the standard crank or running the 54x42 chain rings.
Between the DuraAce (7800) and Ultegra (6600) double there's not much difference other than weight/finish/added durability, these translating into premium $$$$. But, changing the FD will probably not correct the chain falling though.
Dura-Ace vs. Ultegra:
Another thing to look as is the chainline. Did you recently change wheels? Sometimes the position of the hub can cause the chain to fall off the big ring to the little ring. Using spacers between the cassette and freehub body may help correct this case.
Last edited by NoRacer; 07-31-09 at 10:22 AM.