Is it just me, or are those wheels WAY undersized?
This, from the guy with 12" wheels.... oh, right, the Fiber Stream
has a double helping of them!
Yes, I think they're too small, but lots of trailers are operated at highway speeds with 8" wheels and carrying significant loads. A common example is snowmobile trailers - the sleds are wide so to put two side-by-side the deck goes over the tires
(not between them) and small tires are used to keep the deck height down. I shudder to think of what the bearings are doing and what happens at a pothole, but it seems to work.
The Craigslist page won't open for me (server too busy), but from the photo in the original post they don't look like solid tires to me - too big and "balloon" shaped. They do look like they belong on a wheelbarrow...