Did you know, that you can mention users putting an “@” in front of their username? @aws will mention the original builder so that he will get a notification and hopefully can answer here.
The Questions about the tires are already answered by Jim.
The rims are custom. When you zoom in, you can see, that they both have multiple joints. Those were smaller rims before, that were rolled to the bigger radius. In this post (german) @Ulkicycling describes, how this is done. He made a custom lightweigth 36" rim before carbon 36ers were available.