I have a Nexus 3-speed hub (on an Electra Amsterdam women's) that is slow to downshift. I've adjusted the tension correctly, I believe, so that the yellow indicator is centered between the lines in second gear. Upshifts are immediate and clean.
The problem is that when downshifting from third to second, or second to first, the shift is quite delayed -- it often takes several seconds and several rotations of the cranks before the shift actually happens. I've tried adjusting the cable so that it is "closer" to the lower gears, but it doesn't matter. It seems like it's not a problem of the cable pulling correctly, but rather an internal stickiness that causes the shift to take some time to take effect.
Any suggestions? Thanks!