SMARTLY DESIGNED INVERTED FE² TECHNOLOGY Inverted Fe2 technology boasts a higher RG and differential like most other balls in the Thunder Line. A1S: STORM'S ADHESION SYSTEM TECHNOLOGY The A1S Pearl Reactive coverstock debuts Storm’s Adhesion System technology, setting a new standard in lane grip and responsiveness The Hy-Road 40 celebrates four decades of Storm innovation by continuing the legacy of one of the most trusted names in bowling. At its core lies the legendary Inverted Fe² Technology—Storm’s most successful core design—delivering unmatched energy retention and dynamic hitting power. Wrapped in the newly engineered A1S Pearl coverstock—one of the fastest oil-absorbing materials in our lineup—the Hy-Road 40 maintains a consistent reaction shot after shot, especially on heavier conditions where oil buildup can compromise performance. The Hy-Road 40 is a tribute to where we’ve been—and a bold step toward where you’re headed.