If you aren't skating the Bones Hardcore Bushings yet you need to switch them out with the stock bushings you have on your trucks immediately. These things rock; there is no break-in period, they make your trucks more responsive, they do not stick, and they are the only bushings on the market that allow both sides of the bushings to work properly when turning instead of just one side. They come in white or black, and there are three hardnesses; Hard 96A, Medium 91A, and Soft 81A.