Originally Posted by
jimmuller
I haven't been doing much bike work lately, nor even much riding or visiting BF. I've been out a few times this summer and we have taken the tandem out a few times. Been having trouble with the tandem's drive train. Time to do some investigation.
Do you see anything wrong here?
Time for new rings and chain (not installed yet). Ignore the dirty bits. I guess 15,000 miles will have an effect.
New tires too.
yes I do see something wrong. I think the front derailleur cage is too close to the teeth on the big ring. Campy at least says to set the height of the derailleur for 1.5 mm to 3 mm vertical clearance. I use this spec for all my bike setups. With the cage too low, the cage tries to drive the chain through the outer chainring rather than helping it sneak through.