without bearing the wheels wouldn't be able to spin and the ride wouldn't be as smooth
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.
Wheels dont make a skateboard easier to turn on the skateboard trucks do that.
no
yes the sizes of skateboard wheels range from 40-70 mm
Bones wheels
Check the brakes. If not that then check the barrings in the wheels.
The bearings are usually silver looking discs that are in the wheels. They can be any color, but since they are usually metal, the most common color is silver. When you assemble a skateboard, you have to press the bearings into the wheels before you put the wheels onto the trucks. This is what gives you speed, not the wheels. Bearins are rated usually ABEC 1 - 7 (except for bones). Basically, the higher the number the faster they will be, but also the price.
yes
polyurathayne,
4
Wheels