Bearings, They are in the metal wheel in the middle of the wheel to make it rotate around the truck axel. the wheels are usually solid if that's what your asking.
Its for when you tighten your wheel on it reduces the risk for crushing the bearings by over tightening. It reduces the space the bearings have to budge. Hope this helped
a bearing
Two bearings hold each wheel of a skateboard to the axle. These bearings are generally made out of steel. On some more expensive models, they may be made from silicon nitride, which is a ceramic.
Bearings? They are small round metal things that have little ball bearings inside (hence the name"Bearings"). They sit inside the middle of the wheel. When you are riding, bearings keep the wheel spinning when you aren't pushing the board so that you keep moving and don't stop abruptly.
He uses an 8 inch element skateboard, destructo trucks,element wheels, speed metal bearings, element grip tape
Lubricant is basically an oil. There are bearings in a car or even a skateboard which requires lubircant so the metal will be able to control its temperature and avoid damage from friction and dirt.
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.
Little metal balls that help the wheel spin. The best ones are Reds Dragon
Wheel bearings are small metal rods or balls that are placed between the inside of a wheel and it's axle, in order to reduce friction.
metal :)
A sheet of metal forming the bottom of something, e.g. a skateboard.
Lubricant is basically an oil. There are bearings in a car or even a skateboard which requires lubircant so the metal will be able to control its temperature and avoid damage from friction and dirt.
Plastic? Ive never seen metal wheels
Ball bearings