I have a problem with a used tandem I just purchased, I can't make it shift in the big ring, no matter how much tweaking I do.
Information: Bike: its a 2006 Trek T2000,before I purchased the bike, it has been converted from 9 to 10 speed.
From what I can tell and the part numbers, it seems that I have a compatibility issues with older 9 speed crank and 10 speed derailleur.
Fron Derailleur is a FD-6603
Crank is a FC-6503
Could it be that the 10 speed chain is just not made to shift with the older 9 speed crank? no narrow chain will not catch the gates and pins?
What are my options to make it work? Do I have to change the whole crank and put a 10 speed crank? I am at a loss here
Thank you for your help!