Yes, I ride a V-Rex, the 20" Alex rim is very strong.
But 20" wheels are absolutely brutal for any edge around an inch tall, especially at speed. I have encountered raised sections of concrete that required me slow or even stop and walk over. I'll bet you have as well.
Simple matter of physics, a smaller diameter wheel does not roll over obstructions as well as a larger one.
The other huge issue with recumbents is they do not allow lifting the front wheel, no way to hop. Even unloaded I'll bet that cargo bike has a similar issue. Loaded and you will be hitting crap you can't see.
Last edited by Pop N Wood; 12-22-20 at 07:52 AM.