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Storm Tropical Surge Black-Cherry specs
The Storm Tropical Surge Black-Cherry is a hybrid reactive ball with the Surge Core core. Here are its published specs, how they compare with the other current balls in our table, and what the numbers mean on the lane.
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| Coverstock | Reactor Hybrid |
|---|---|
| Cover type | Hybrid reactive |
| Core (weight block) | Surge Core |
| Core type | Symmetric |
| RG | 2.580 |
| Differential | 0.024 |
| Factory finish | 1500 Grit Polished |
| Flare potential (maker) | Low |
| Maker's category | Tropical |
| Color | Black/Cherry |
Numbers as Storm publishes them, checked 21 October 2026. Storm doesn't say which ball weight these numbers are for. Drilling changes how a ball behaves, so a pro shop's layout matters as much as these numbers.
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What the numbers mean
RG 2.580. That is lower than 7% of the 134 current reactive and urethane balls in our table, so it sits on the high side. Storm says "a high RG ball delays its revving, offering more length and angular motion down the lane."
Differential 0.024. Higher than 6% of the balls in our table. Storm says "a low differential ball tends to have a more predictable, controlled motion."
Hybrid reactive cover. Hybrids mix solid and pearl; Storm says they suit bowlers who need a ball "that can adapt to a variety of lane conditions."
Symmetric core. Storm says symmetric balls have "RG values consistent across all axes" and a smooth, predictable roll.
USBC allows an RG from 2.447 to 2.813 inches and a differential of at most 0.060 inches (Equipment Specifications Manual, March 2026). Our ball spec table lists every current ball we track, and who makes bowling balls covers which company owns Storm.
Balls with similar numbers
Same cover type, closest RG and differential in our table:
- Roto Grip Hustle SOS: RG 2.530, differential 0.030
- Motiv Max Thrill Hybrid: RG 2.550, differential 0.037
- Hammer Raw Hammer (Juiced Hybrid): RG 2.537, differential 0.038
- Brunswick Fury - Emerald / Black: RG 2.524, differential 0.038
Sources: Storm product page; Storm, "Inside The Bowling Ball"; Storm, "The Coverstock"; bowling.com coverstock FAQ; USBC Equipment Specifications Manual.