A bowling ball's coverstock is the outer layer and it's very important on how the ball rolls. There are three main coverstocks -- plastic, urethane, and reactive resin.

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The main coverstocks available are plastic, urethane, pearl, solid, and hybrid. These range from least reactive (plastic), meaning they move less as they roll, to most reactive (solid ...

Actually, it is stated that the wooden version of the modern bowling ball was invented on this day in 1862. Today, they use some sort of plastic/polyester compound. Truthfully, I’m a little ...