Saw one of these on Burnet Rd. in Austin today. It’s a Piaggio MP3. Apparently the front wheels “loosen up” at speed to allow for cornering, but are stiff at idle so you don’t have to hold the bike up with your legs. There are, supposedly, other advantages as well. I’m no bike expert, but it seems like an interesting novelty. Glad, as always, of comments from those in the know.