The picture I put are not showing its lightest status.
Of course there are many carbon and titanium parts equipped, and some customized stuff.
I know a guy here could manage to lower the weight of a SPEED to nearly 7kg. He even make cutouts on the frame!
And if you want a superlight bike, MU is not the first choice. Its frame is really heavy, probably heavier than the steel SPEED.
HELIOS is the lightest DAHON frame I have ever had. You should consider it.
BTW, maybe I shouldn't tell you this: I always make my bikes lighter and lighter, but the weight of my body has increased a lot!!!!
Yeah I am thinking the Mu frame is really heavy. But I like it visually far better than the rest.