prathmann

Either untapped or too small to be worthwhile. Sure the hubs are much heavier, but only by a couple pounds. And you save about a pound by dropping the derailleurs and having only a single cog instead of a whole cassette. So the penalty should only be about a pound.

But the IGH bikes don't appear to be targeted toward folks who are willing to pay a premium for a bike that's a little lighter. Instead of focusing on lighter (but more expensive) components the upscale models tend to be equipped with additional accessories that add more weight (fenders, racks, lights, dynamos, kickstands, etc.).