The design feature of the Bones HardCore Black Bushings, is the built in insert. It increases the precision of your truck by by limiting side to side movement of the hanger, increasing rebound, stability, and steering.
The design will also mean you can use a softer bushing that you normally would. The softer bushing just backs more resistance, so you can feel a better flow on turns, or if you need immediate board control for a shut down this bushing gives, so you don’t loose control.When turning a normal truck, the hanger web puts pressure on one side of each bushing (top and bottom). This squeezes that side and pushes the other side of each bushing away from the kingpin. This is called a single action bushing, because only one side of the bushing works at a time.
The HardCore insert in the centre of BONES bushings connects the two sides of each bushing together by bonding them to the HardCore insert. When the hanger web squeezes one side of a HardCore bushing, that side of the bushing reacts just like a normal bushing, but the chemical bond between the HardCore and the cushion keep the bushing from being squeezed out the other side. It actually increases the resistance to turning because it is held in place by the HardCore insert. This means both sides of the BONES HardCore Bushing are resisting your turning force. That’s why BONES Bushings are called the first double action truck bushings.