I have a new project: building a city bicycle around a Nexus 8 hub. It should have front generator hub, fenders, rack and not be too heavy. I'd prefer a steel frame with rigid fork.
700 road frames are nice, but they haven't enough clearance for 32-35 mm tires and fenders. I know some have used 650b/584 rims, but these (and tires) are very hard to find where I live, so I thought about fitting 26"/559 rims. For the brakes some kind of drop bolt could work.
The difference in diameter is about 35mm, so the BB would be 18 mm lower.
What do you think?