I recently bought a Tandem from the 90's and now trying to adjust the derailleurs. But, no matter what I do, I don't manage to properly set up the 3-way front derailleur. It either
- properly shifts from lowest to 2nd or
- properly shifts from 2nd to highest.
I noticed that the crank and chainwheels don't seem to fit to the rest. The front/rear rear-derailleur and the captain crankset are a black and Shimano Deore LX FC-M563 to my best guess, while the stroker crankset is silver and some "Shimano" which I cannot further specify.
I am therefore wondering if that could be the reason for the derailleur not working properly. Or should one-shimano-fit-all, no matter which model?
I also noticed that the chainwheels seem to be not equally spaced. It's ~8mm from lowest to 2nd and ~5mm from 2nd to highest. As far as I can tell, on all my other bikes the spacing is equal and ~5mm. Are there such 'weird' cranksets or has it just been incorrectly assembled? i.e. could I possibly fix my problem by exchanging some spacers instead of buying a new crankset?