Vouched as I couldn't see any dupes but eventually found [1] [2] [3] I really don't see the motor being robust enough for anything but vehicles that will travel almost always on sealed smooth roads. Wheels end up getting a hiding and have seen plenty of cracked mag wheels over the last 30 years or so ... but on that note, I don't see it as often anymore.

[1] https://news.ycombinator.com/item?id=42631876 (18 days ago, 39 comments)

[2] https://news.ycombinator.com/item?id=42698346 (14 days ago, 0 comments)

[3] https://news.ycombinator.com/item?id=42713324 (13 days ago, 2 comments)