look at this trike, what a powerhouse

[WLL]

look at this tree hugging treewheeler

[Rustytinhorn]

Haha. I guess that makes it a "TREE Wheeler"
The biggest one I've ever seen was a 250r with a 1100cc engine in it. It was for sale locally a while ago. Cant rememner the price, but I do remember it was way up there, like $5 or $7000 or so.