- Gravity Evolve

First Impressions
The Storm Gravity Evolve comes in the striking Gunmetal/Fire/Crimson color scheme and combines two established Storm technologies. At its heart sits the proven Shape-Lock HD core with a low 2.48 RG at 15 pounds and a high 0.052 differential, which provides increased flare potential. The HD designation stands for High Density, which lowers the RG and raises the differential of the weight block — more differential means more flare potential, so that a fresh portion of the surface is exposed to the oil on every revolution. The cover is the SPEC Solid Reactive surface with a factory 2000 grit Abralon finish, which delivers aggressive traction on the lane. SPEC stands for "Storm Performance Enhanced Coverstock" and was developed to withstand the stresses a bowling ball faces on every trip down the lane — particularly friction and oil.
Comparison
Head to head, the Gravity Evolve slots between a Storm SureLock and a Storm CodeX in terms of angle on the back end of the lane. The ball creates more backend than the Storm Crux Prime and also more than the Storm Pro Motion. Compared to the Storm Physix, both balls are fairly similar in overall shape, though the Evolve goes through the pins less consistently than the Physix. The ball feels like a blend of the original Virtual Gravity and the Virtual Gravity Nano — earlier and smoother than the original, but a bit longer and stronger than the Nano. Compared to other Storm covers, the Evolve is not a typical strong reaction to friction at the end of the lane, but rather a controlled hook shape for heavier oil volumes.
On the Lanes
The Gravity Evolve is ideal if you're looking for a ball for wet or long patterns, since it handles more oil than most bowlers are used to without any trouble. If you need a big-rolling asymmetric ball to attack high-volume patterns, it makes an excellent choice. On fresh heavy oil patterns it controls the breakpoint easily, and all testers started left of the track area to take advantage of the aggressive surface. Especially on higher volumes of shorter patterns, its earlier chugginess and smooth motion on the back end should provide control. The combination of the very rolly Shape Lock HD core and the very aggressive SPEC surface produces a ball that reads the midlane very well but still offers plenty of continuation through the back end. Power players benefit from the fact that the ball gets stronger with use, while it stays clean through the midlane and shows a strong backend reaction.