I've been hoping someone would come out with something like this for a beach cart. Dragging a heavy cart over soft sand has to be one of the biggest problems of our time.
The bike has a 10-inch-wide ATV tire on front to give float. The company touts you can “easily glide over soft beach sand as well as deep snow, mud, high grass, gravel, and anywhere else that regular bikes can’t go.”
It has a 4.6-inch rear tire and a 500-watt motor for pedal-assist. A special fork lets you swap the massive rubber up front for a normal fat tire when less float is required.