Why no bikes? Mechanical advantage, that's why. Roller blades offer no mechanical advantage. You'll see plenty of adults riding scooters, too, many of which are bikes modified to eliminate a chain.
You're all wrong. Having once driven diagonally across the state of Arkansas, I can attest that the boredom is almost lethal. These birds were obviously bored to death while migrating south.
Roller blades offer no mechanical advantage. You'll see plenty of adults riding scooters, too, many of which are bikes modified to eliminate a chain.
Belt!?
Rubber!?
Huzzah!