Frame-mounted basket options Team,

I recently acquired a Yuba Mundo cargo bike, which is wonderful, but I would like a little more storage room when I have passengers on the load space in back. It has these two mounting points for a front basket on the downtube and top tube.



Yuba sells a basket designed to work with this system, but I'm not entirely keen on it. Is this a standard system that other manufacturers make baskets for, or is this a Yuba proprietary system?
Yes, that's a proprietary system. 

That said, front racks and baskets that mount to the head tube are very stable. The rack basket doesn't flop around when parked and it doesn't affect steering when you're riding. Unfortunately there aren't standard head tube mounts (Brompton has one design for example). Until a standard emerges, this is the best we can do with. The only downside aside from the price is that you can't easily hang large front side panniers because they would interfere with steering. 

Most off the shelf front baskets and pannier racks mount either to the handlebars or to the pannier mounts on the front fork and suffer from said mentioned floppiness. 

Tldr: it's proprietary but worth shelling out for.