Do Rokons really leave a track lighter than a man's foot print? There are many variables involved in calculating ground contact pressure, including vehicle weight, load, attitude, and contact patch size which includes the variables, tire size, tire stiffness, tire pressure, soil condition, and others. Here is an educated guestimate:
Force downward: rider, 200# + vehicle, 200 = 400lbs
Contact patch size at 3psi inflation pressure: 6 x 8 x 2 tires=. 96in sq
Ground contact pressure: F/Area=400lb/96in sq= 4 psi
By comparison, the 200lb man when on one foot, which he would be while striding forward, might have a contact patch of 32 in sq, depending on his shoe size, for a ground contact pressure of 6psi.