Originally Posted by
veganbikes
Still though that is a lot of miles for a single chain so I would have to imagine it would need to be replaced. Being it is fully enclosed it probably sees even less maintenance (which yes granted it will require a little less depending on how well sealed it is). I would be quite surprised if it wasn't worn out.
I've cleaned and lubed it maybe half a dozen times (which is a PITA, because you have to remove the encasement). Each time I was surprised at how clean it still was.
I used to go through 2-3 chains per year on my road bikes (and I was Q-tip and Tri-Flow diligent weekly). It's pretty amazing how much road grit the front tire throws on the chain, and how damaging it is.