Originally Posted by
lee_rimar
Not me, I'm with you on this one.
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.
I doubt the gravel on your road is much bigger than 1" in diameter. If the machine is otherwise optimized, a 6" diameter wheel should easily be able to roll over things smaller than 3" or so. I don't believe the issue of your imitation A-bike choking on a pine cone is inherently tied to wheel diameter. A basketball rolled along the ground at speed can often plow over a street curb. Monster Trucks climb over obstacles approaching their wheel size. There are other factors at play. Of course, efficiency is another story, but lots of popular bike improvements sacrifice efficiency (brakes, hub gears, etc).
The width of the Carryme's tires are 1.5". Not very wide, but I believe the wheelbase is much longer than the A-bike.