I've only had my second-hand Dahon about three years. It was old but little-used when bought. Nonetheless, I had to replace the cassette after a year or so. Now it seems to be worn out again. So, to be fair, is the FSA chain ring - I had to put a complete new chainset on a year or so ago, after I broke a crank.
Given that this is a folder used for rail commuting, and does maybe 1500 miles a year tops, that seems a bit quick. I suppose there's far more stopping and pulling away from lights than normal, so maybe it gets a hard life.
Thoughts? Do I give up and replace the hub with a Shimano one, in the hope of getting more life?