Originally Posted by
P!N20
Could be any number of things. I suspect that if it works then jams, it’s capable of working.
Can you explain the jamming a bit more? When it jams does it stop going up and down gears or just down? (Up = smaller sprockets, down = larger sprockets.)
Is there a gear it typically happens in? Can you replicate the jam in the workstand? When it jams is the cable tight or loose?
So when it un-jams you haven’t actually done anything, it just starts working?
It jams in the small sprockets, the smallest and the next smallest are the only gears available. It seems the thumb lever works fine but lever 2 is what jams. It will still move so maybe jam isn't the correct term but it won't click. So it's going down that it has trouble.
When it starts working again, I've really done nothing other than continually shift between the two gears available and then stopping. Not sure if the stopping is the cure or the shifting is.
Not sure about the cable tightness. I don't have a bike stand so replicating even basic ergo shifting without riding is difficult.