To me, one of those things with 2 wheels is a bike, whether motorized or pedaled. These days things with 3 or 4 wheels are commonly called bikes. I expect to see a Razor with 2 wheels. Things with 3 wheels are trikes and those with 4 are quads. There are some with 6 or 8 wheels but they're usually called darn expensive. Got it?

+ one on that!!

Ed

My bike has a 96 cubic inch V-twin.
My atvs are 4 wheelers.
Quads are the large muscles in my thighs.
I vaguely recall bicycles as a primitive form of transportation used before you afford something with an engine.