I was thinking that the motor can be completely housed within the bottom bracket so that you can't really tell there's a motor there. Of course, the frame would have to be designed to have a larger BB to hold such motors. I don't see any batteries in the picture above so either they're not there or the can shaped like stuff sticking out of the motor is the battery.Originally Posted by Zeuser
You can currently install a BB motor using the cyclone-usa kits. These kits attach under and just behind the BB.
If these BB based motors can be integrated with the frame, that would be something I'd definitely buy.