The coverstock is the outermost shell of the bowling ball and it influences how the ball will roll on the lane. There are mainly three different types of coverstocks used in a bowling ball. They include:
Reactive resin is used in high performance bowling balls and is favored by advanced players. It offers superior hook potential and pin control over most coverstocks. That is, because, reactive resin generates higher friction on lane surfaces to give the professionals an added advantage. On the flip side, It’s a bit difficult to control unless you’re an advanced player.
Polyester is also another popular type of coverstocks. Its surface is smooth to minimize friction and make it ideal as a spare ball. It’s got the lowest hook potential, however, it provides far better control.
Urethane is a step-up from Polyester and is a great mid-tier option for coverstocks on bowling balls. It’s more durable than Polyester, offers more friction to provide better hook potential. And is easy to control.