The Storm Tropical bowling ball legacy continues with the Surge core making a great bowling ball for entry level and casual league bowlers. The bright fun colors and unique fragrances make these fun balls appealing to bowlers of every skill level. Each ball features the Reactor Hybrid Reactive coverstock that glides through the front of the lane, reacts down-lane, and creates optimum pin carry. The Surge core has a higher differential which brings dependability and a little more hook at the backend.