I have a 5-spd hub and have adjusted the gears according to the instructions that came with it, ie: the blue marking on the adjuster chain just peeking out of the axle when in 2nd gear. That worked fine for while but since then the gears are continually out of whack with missed gears etc. Every time I ride I have to 'tweak' the adjustment but never seem to get it quite right.
Actually, I am sorry that I went for the 5-spd and not the 3-spd because of these constant problems. Also, when the hub is working, there is no discernible difference between 2nd and 3rd gears.
What am I doing wrong? I would welcome any suggestions.