Faccio notare che la forcella non ha il tradizionale cannotto che viene fissato all'attacco manubrio.
L'attacco è un pezzo unico, che si prolunga fino alla testa della forcella, sulla quale è imbullonato.
L'attacco manubrio ha un foro passante per i cavi, ma è sagomato internamente in modo da far ruotare il manubrio di 90° (altrimenti i cavi si trancerebbero).
Qui riporto il testo esplicativo dell'articolo:
To make this work, the stem and steerer tube are one piece and the fork clamps to it at the bottom. It essentially uses an upside down Aheadset nut to tighten the fork and stem/steerer into the the headset, which is tightened into place from under the fork crown. Once thats tight, the front brake is attached using a shortened bolt that, rather than running through the entire fork crown like normal, tightens up against a curved washer on the inside front wall of the fork.
The steerer tube has a cut out thats smoothed edges to funnel the wires into the downtube. The hole allows the bar to rotate 90º, at which point it would hit the frame and stop anyway. Rob says the real stress points are where the steerer tube interfaces with the headset, so the hole doesnt diminish the structural integrity of the system and that he thickened up the ends of the steerer tube, too.