Originally Posted by
unterhausen
Shimano dynohubs fail right and left, but nobody mentions it. Who would design a cup and cone hub that can't be overhauled? Shimano. I have one that's probably ruined. I can't make myself throw it away because people have figured out how to overhaul them, but I've never overhauled a hub that felt like that which was still worth riding.
I have two and have had no trouble yet. I picked both up used. As I recall, their drag when not being used for power is substantially more than the Son but only marginally more when engaged. Whatever, one of them did a satisfactory job powering my electronics on a tour from Missoula to Denali a couple years ago and still seems to be going strong.