Originally Posted by 42x16
It was a momentary delusion. Everything is back in focus again, that was scary.

Why would I do that? I would just ride it as a singlespeed and I'd be carrying the extra weight of the internal hub.
Why do that? For the same reason that you probably would consider shifting gears on a high powered sports/muscle car. Sure you could drive off in high gear, go up and down hills; never shift gears; the power is there. IMO seems pretty silly or obsessive to make a deliberate decision to make your cycling more difficult unless a workout is the desired goal. In that case a one speed balloon tired bike with a rusty chain found at any garage sale for under $10 should work; duct taping a few cinder blocks somewhere on the frame (or maybe in a backpack) would be a simple and cheap way to intensify the workout factor during commuting and be very reliable as well.