COEFFICIENT OF RESTITUTION The new Quantum Forest Green Solid has been designed with 3.5 times more coverstock increasing durability and performance longevity with an amazing pin impact you not only see but hear! Why does more coverstock improve the pin action so much? More coverstock enhances the Coefficient of Restitution which is the ratio of the differences in velocity between two objects before and after a collision. The higher the restitution, the faster the pins will move after being struck by the ball, transferring that increased kinetic energy to the surrounding pins producing greater pin action! COVERSTOCK The combination of our highly popular PK 2016 solid reactive coverstock with our high-density, redesigned Quantum Mushroom core, gives the Quantum Forest Green Solid easy length through the front, with incredible traction in the mid-lane, producing tremendous backend reaction on oily lane conditions.
