By "berrings" i assume you mean "bEArings". Anyway, its kinda like opening a bottle of beer. Take the wheel with the bearings off the trucks, and use the end of the hangar of the truck to prize out the bearing. Easy as pie!
Wd-40
Give us the year, make and model please.
No way. Its impossible
The skateboard have wheel & axle and screw, the wheel is obvious the wheel and the axle is the truck and i think the screw is the hardware.
the circumference of the wheel
bum
Yes because on the bottom of the skateboard the wheel would be the wheel and the cylindrical metal part next to the wheel is the axle.
pop them out of the wheel
the hardness of the wheel. The higher the number, the harder the wheel will be :)
really any good local skateshop and the best berrings are either bone Swiss abec 7's or ruch abec 7's that ive hadd
a skateboard has 8 bearings. 2 bearings inside each wheel facing opposite ways inside each wheel
definetly