Smartly designed Inverted Fe² Technology
Inverted Fe2 technology boasts a higher RG and differential like most other balls in the Thunder Line, but with one very important benefit: it lacks the core material that most other balls have. This enables the ball to have a much thicker shell which raises the coefficient of restitution. A higher energy transfer to the pins with less deflection upon impact is what can be expected with this design.
A1S: STORM'S ADHESION SYSTEM TECHNOLOGY
IThe A1S Pearl Reactive, powered by Storm’s Adhesion System technology, delivers exceptional lane grip and responsiveness, setting a new standard in performance. Engineered for exceptional tackiness, this innovative material is also one of the fastest oil-absorbing coverstocks in our lineup. That means less oil lingers on the surface between shots, helping the ball maintain full contact with the lane for a cleaner, more consistent motion. Without this absorption, oil buildup can cause the ball to hydroplane or "miss the spot"—leading to unpredictable results. Paired with our Power Edge Polish, A1S delivers effortless length and a sharp, controlled move at the breakpoint.