According to its designers, the trials quad concept shown last fall at the EICMA Show, is headed for production.

The visitors at EICMA loved it and next thing you know, Scorpa is now looking at creating a production version, and is working on rideable prototypes with an engine of between 125cc and 200cc.

Since I do not believe there is any sort of 4 wheel trials competition (is there?), this would be just for fun but it looks like it could be pretty cool.