Originally Posted by
makeinu
In general I think that wheel size is much much less important than people think it is.
Not me, I'm with you on this one.
... smallest practical wheel size is slightly larger than the biggest crack you plan to encounter.
Good point, "smallest practical" depends on what you're riding on. 90% of my riding is smooth pavement, yet I live on a gravel road. So however small I go, I need the widest practical tyre. What kind of rubber comes on the CarryMe?
Additionally, the biggest BUMP you might encounter is a factor as well - if you can't avoid it or unweight the front wheel over something. Last night I was turning tight figure-eights in my driveway to show off the A-Bike to some friends, and suddenly the front wheel just seized as solidly as if I had hit the brake.
I kid you not: The A-Bike choked on a small pine cone.