Inside shoe shelf protects up to size 15 shoes

Profile:For the "stroker" who wants the least amount of brake

Core: Spheroid

Safe for use on all ball types

Roto Grip Nuclear Cell Bowling Ball tier 4 10% Inside shoe shelf protects upInside you will find the forever famous Nucleus Core. By far the most versatile asymmetrical core design ever created. No matter how it is drilled, or how you toss it down the lane, this core always gets into motion and stays in motion. Our newest version of eTrax Pearl contains a new chemical additive as well as ratio changes in order to produce better traction in the midlane and create more responsiveness to friction down lane. There is no doubt the