The seat is attached to the front column, not to the bottom bracket like on most other bikes (folding or not). This seems to give them a better portability return for sacrificing wheel base than other designs. So that's what they did, apparently: the side views look like on the brink of a wheelie from even the slightest acceleration or incline, all while not getting the CoG all too far from stoppie tipovers. The advertised 25 km/h will feel maddeningly fast.