" It seems to me that making it enclosed defeats some of the most significant benefits to a bicycle: compactness. Once something gets over the "too big for a bi

" It seems to me that making it enclosed defeats some of the most significant benefits to a bicycle: compactness. Once something gets over the "too big for a bike rack or my apartment" threshold, you run into parking problems" This was my first thought. Also, if you can't ride on the sidewalk, it's way too big and slow to be in normal traffic. I'm sure it would irk the hell out of people driving cars as well. A lose/lose proposition if you ask me.