With Bones Hardcore Bushings, you will notice a number of positive improvements in the performance of your trucks:

There is no break-in period. Just put them in, adjust and skate.
Your trucks will be more responsive.
Increased truck performance
Improves your skating experience.
Your turns will be smooth and positive, not floppy or rigid.
3 Hardnesses: Hard Bushing: 96A, Medium Bushing: 91A, Soft Bushing: 81A

Features:

Patented Double Action bushing
Chemically bonded core insert
High rebound urethane