The risk with the three-wheeled ones is that they are perfectly stable right until they aren't. You're either upright or on your ass. The steeper you turn the s

The risk with the three-wheeled ones is that they are perfectly stable right until they aren't. You're either upright or on your ass. The steeper you turn the smaller the stable area gets, even when going slow. The two wheeled ones have more of a gradient. You'll feel it when it starts to go so you can course-correct. The nice thing about the three wheeled ones is you don't need to use a kickstand, though the two-wheelers tend to have really solid kickstands.