The Dryvtech 2x2x2 features hydraulically actuated steering of both wheels- that is to say there is no mechanical connection between the handlebars and the wheels.  Turning the handlebars operates a hydraulic master cylinder which pressurises oil (separate from the drive system oil) and sends it down flexible hoses to a ram (slave cylinder) mounted near the hub which moves the wheel.  Both wheels are steered, but not together nor at a linear rate, while an accumulator (effectively a 'hydraulic battery') maintains steering system pressure.

From the very start of the project - the design was to have a delay mechanism built into the 2 wheel steering so the front would steer for some amount before the rear started to steer.  This served 2 purposes- firstly to allow normal countersteering to initiate a turn and secondly to 'freeze' the rear steering at high speed (when very little steering lock is used) so that rocks and ruts would not cause 'bump steer' (to the wide rear tyre).

Several 4 bar mechanisms were investigated but wouldn't give enough period of 'freeze' for the rear steering.  The final design uses a mechanism that is effectively one segment of a 'geneva mechanism' - usually used (in complete form) for indexing duties in machine tools, canneries and even movie camera lenses. Rollers mounted on a plate attached to the 'steering column' run into 2 slots that are in a plate attached to the rear steering link (hydraulic in this case but could be cable or mechanical linkage).  The slots are tangential to the path of the rollers so there is no 'jump' as one roller leaves and the other enters their respective slots.  At the front however, the connection is constant and linear at a rate of around 2:1, the delay mechanism gives 5 degrees of handlebar movement before the rear wheel begins to steer.