Look at the ground clearance, and the length of the wheelbase.
Every time you go over a bump, there's going to be significant up-and-down oscillation, From the picture, it looks like there's about a two-inch (or less) ground clearance under the driver, the driver and engine together probably mass about 600 pounds. The distance from the center of mass to the point of contact between the front wheel and the road looks like about six feet.
Fuhgeddaboudit.
I just realized, from a dynamic standpoint, it’s ridiculous.
Look at the ground clearance, and the length of the wheelbase.
You are correct. The fact they could run it on the street is amazing.
Looks cool, though.
It has got invisible 'rubber baby buggy bumper' shocks for that.
Smooth rides are so passé!