Home / Equipment / Ball Specs / Concept
Storm · ball specs
Storm Concept specs
The Storm Concept is a pearl reactive ball with the Radius 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.
Disclosure: this page has affiliate links. If you buy through them, we may earn a commission at no extra cost to you. As an Amazon Associate we earn from qualifying purchases. How this works.
| Coverstock | ARC Pearl |
|---|---|
| Cover type | Pearl reactive |
| Core (weight block) | Radius |
| Core type | Symmetric |
| RG | 2.590 |
| Differential | 0.019 |
| Factory finish | 1000 Grit |
| Flare potential (maker) | Low |
| Maker's category | Lab |
| Color | Teal/Imperial Blue |
| Weights | 14-16lbs (description) |
| Release date (maker) | 02/27/26 |
| USBC approved | 20 January 2026 |
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.
Find the Concept on Amazon → Compare with another ball Add to my arsenal
What the numbers mean
RG 2.590. That is lower than 4% 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 0.019. Higher than 3% of the balls in our table. Storm says "a low differential ball tends to have a more predictable, controlled motion."
Pearl reactive cover. Pearl covers skid farther before they hook; bowling.com calls them best on medium to dry lanes, and Storm ties them to dry 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:
- Motiv Ascend: RG 2.590, differential 0.023
- Storm Tropical Surge: RG 2.580, differential 0.024
- Motiv Frenzy: RG 2.550, differential 0.030
- Roto Grip Hustle (VTC Pearl): RG 2.530, differential 0.030
Sources: Storm product page; Storm, "Inside The Bowling Ball"; Storm, "The Coverstock"; bowling.com coverstock FAQ; USBC Approved Ball List (20 October 2026); USBC Equipment Specifications Manual.