The skateboard goes faster if the skateboards wheels are good and fast than the skateboard will go faster than a ripstick.
A skateboard has 4 wheels.
Wheels dont make a skateboard easier to turn on the skateboard trucks do that.
Get fast bearings, and keep theme greased.
the friction between the wheels and the surface of the ground affect the speed of the skateboard. fo instance if you ride the skateboard on a smooth surface (with less friction) the skateboard will go faster.
yes the sizes of skateboard wheels range from 40-70 mm
Well, if for turbo skateboard you mean a skateboard that goes really fast, then the answer is yes! It all depends of the type of wheels you are using, the trucks and how loose or tight they are, the material of the skateboard, the strenght you put on your toes when impulsing and the ground where are you skating.
It is pretty much a wheely on a skateboard but with 2 wheels.