Bowling ball core · Storm
Storm C3 A.I. Core
Symmetric Storm core
A symmetric core with early rev-up and low flare, built for medium oil. 1 of the 3 balls with this core are in stock at BowlersMart.
- Symmetric
- RG 2.480
- Diff 0.031

Specs
RG AT 15 LB
2.480
Early rev-up
15% of the reactive and urethane balls we stock have a lower RG.
DIFFERENTIAL AT 15 LB
0.031
Low flare
15% of the reactive and urethane balls we stock have a lower differential.
MASS BIAS AT 15 LB
None
Symmetric core
Symmetric cores have no mass bias marker to place when drilling.
| Weight | RG | DifferentialDiff | Mass biasMB |
|---|---|---|---|
| 16 lb | 2.480 | 0.037 | None |
| 15 lbUsed on this page | 2.480 | 0.031 | None |
| 14 lb | 2.530 | 0.036 | None |
| 13 lb | 2.580 | 0.047 | None |
| 12 lb | 2.640 | 0.037 | None |
Source: Storm published specs, as listed on the Storm IQ Tour A.I. product page. RG and differential change with ball weight; use the row for the weight you throw. The highlighted 15 lb row is the one used on this page.
Balls with the Storm C3 A.I. Core
1 of the 3 balls with the Storm C3 A.I. Core are in stock at BowlersMart. Same core, different covers: pick the cover for the lanes you bowl on.

Storm R2S Hybrid Reactive
Medium oil
Show 2 balls no longer available at BowlersMart
| Ball | Cover | First seen |
|---|---|---|
| Storm Blue IQ Overseas Bowling Ball | Storm R2X Pearl Nano Reactive | August 2025 |
| Storm Blue IQ Overseas X-Comp Bowling Ball | Storm R2X Pearl Nano Reactive | August 2025 |
Where the Storm C3 A.I. sits
Each dot is a core in balls we stock. Cores close together roll alike; the cover and layout decide the rest.
Navy ring = a ball in your bag. Dashed ring = off this chart, or this same core.
Nearest cores, zoomed in
Navy ring = a ball in your bag. Dashed ring = off this chart, or this same core.
Same family: Storm C3 Centripetal Control Core
This core 1 Nearest cores Other cores
| Core | Brand | Shape | RG | Diff | vs this core |
|---|---|---|---|---|---|
|
|
Radical | Symmetric | 2.483 | 0.032 | RG +0.003 · Diff +0.001 |
|
|
Motiv | Symmetric | 2.480 | 0.034 | RG 0.000 · Diff +0.003 |
|
|
Roto Grip | Asymmetric | 2.480 | 0.034 | RG 0.000 · Diff +0.003 |
|
|
Storm | Symmetric | 2.490 | 0.029 | RG +0.010 · Diff −0.002 |
|
|
DV8 | Symmetric | 2.471 | 0.028 | RG −0.009 · Diff −0.003 |
|
|
DV8 | Symmetric | 2.480 | 0.036 | RG 0.000 · Diff +0.005 |
Matches use 15 lb RG and differential.
Drilling and tools
Turn on JavaScript to compare with your ball.Balls with the Storm C3 A.I. Core1 of the 3 balls with the Storm C3 A.I. Core are in stock at BowlersMart. Same core, different covers: pick the cover for the lanes you bowl on.
Questions bowlers ask
What is the RG of the Storm C3 A.I. Core?
At 15 lb the Storm C3 A.I. Core has an RG of 2.480. It ranges from 2.480 to 2.640 across the listed weights.
What is the 14 lb RG of the Storm C3 A.I. Core?
At 14 lb the RG is 2.530.
What is the differential of the Storm C3 A.I. Core?
At 15 lb the differential is 0.031. This is a symmetric core, so mass bias is not applicable.
Which bowling balls use the Storm C3 A.I. Core?
Storm IQ Tour A.I. Bowling Ball, Storm Blue IQ Overseas Bowling Ball, Storm Blue IQ Overseas X-Comp Bowling Ball. 1 are in stock now.
How do the Storm C3 A.I. Core specs change by weight?
At 16 lb: RG 2.480, differential 0.037. At 12 lb: RG 2.640, differential 0.037.
How does the Storm C3 A.I. Core compare with my ball?
Type the ball you throw into the Compare with your ball box on this page. It shows the RG and differential side by side and saves your bag for every core page.
Sources and method
Specs. Storm published specs, as listed on the Storm IQ Tour A.I. product page, as published by the manufacturer.
Baseline. The baseline is 212 in-stock, published reactive and urethane balls. Plastic and polyester covers, 2-piece, 3-piece and pancake cores, missing covers and missing RG or differential values are excluded.
Percentiles. Percentiles are the share of baseline balls with a strictly lower or higher value; ties are not counted.
Nearest cores. Nearest cores are ranked by distance on standardized 15 lb RG and differential, with the same symmetric or asymmetric shape preferred among near ties (distance bands of 0.1).
Mass bias. Mass bias is compared among asymmetric balls with numeric mass bias only.
Updated. Catalog and page updated 2026-10-16.


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