Bowling ball core · Storm
Storm C3 Centripetal Control Core
The core inside the Storm IQ Tour line
A symmetric core with early rev-up and low flare, built for medium to heavy oil. 3 of the 23 balls with this core are in stock at BowlersMart.
- Symmetric
- RG 2.490
- Diff 0.029

Specs
RG AT 15 LB
2.490
Early rev-up
32% of the reactive and urethane balls we stock have a lower RG.
DIFFERENTIAL AT 15 LB
0.029
Low flare
7% 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 | 2.490 | 0.035 | None |
| 15 lbUsed on this page | 2.490 | 0.029 | None |
| 14 lb | 2.540 | 0.034 | None |
| 13 lb | 2.590 | 0.045 | None |
| 12 lb | 2.650 | 0.035 | None |
Source: Storm published specs, as shown on BowlersMart’s original Storm C3 Centripetal Control core page (2022). 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.
1 ball on this core lists different numbers
- Storm IQ Tour Black Overseas Bowling Ball: RG 2.520, diff 0.049, mass bias Not listed at 15 lb
Balls with the Storm C3 Centripetal Control Core
3 of the 23 balls with the Storm C3 Centripetal Control Core are in stock at BowlersMart. Same core, different covers: pick the cover for the lanes you bowl on.
Solid covers
Solid covers grip the lane soonest and suit heavier oil.

Storm R2S Solid Reactive
Medium to heavy oil
Pearl covers
Pearl covers go longer and turn harder at the end, best on medium oil.

Storm R2S Pearl Reactive
Dry to medium oil, medium oil
Urethane covers
Urethane gives a smooth, controllable arc for drier lanes and short patterns.

Control 78 Solid Urethane
Dry to medium oil
Show 20 balls no longer available at BowlersMart
| Ball | Cover | First seen |
|---|---|---|
| Storm IQ Super G Overseas Bowling Ball | Storm R2S Pearl Reactive | August 2023 |
| Storm IQ Tour Ruby Bowling Ball | Storm R2S Pearl Reactive | February 2023 |
| Storm Yellow Sun Storm Limited Edition Bowling Ball | Storm SPEC Solid Reactive | June 2022 |
| Storm IQ Tour 78/U X-Comp Bowling Ball | Control 78 Solid Urethane | July 2026 |
| Storm IQ Tour Fusion Bowling Ball | Storm R2S Hybrid Reactive | December 2013 |
| Storm IQ Tour Nano Bowling Ball | Storm NRG Solid Nano Solid Reactive | October 2014 |
| Storm IQ Tour 30 Bowling Ball | Storm R2S Pearl Reactive | October 2015 |
| Storm IQ Tour Emerald Bowling Ball | Storm R2S Pearl Reactive | July 2019 |
| Storm IQ Tour Nano Pearl Bowling Ball | Storm Nano Pearl Reactive | June 2020 |
| Storm IQ Tour Urethane Red Overseas Bowling Ball | Storm U1S Solid Urethane | January 2019 |
| Storm IQ Tour Black Overseas Bowling Ball | Storm Reactor XG Hybrid Reactive | December 2019 |
| Storm IQ Tour Edition II Overseas Bowling Ball | Storm R2S Solid Reactive | January 2020 |
| Roto Grip Sword Nano Overseas Bowling Ball | Storm NRG Smooth Hybrid Reactive | January 2020 |
| Storm IQ Tour Nano Purple Overseas Bowling Ball | Storm NRG Solid Nano Solid Reactive | May 2022 |
| Storm IQ Tour U Overseas Bowling Ball | Storm UreMax Solid | June 2022 |
| Storm IQ Tour Blue Overseas Bowling Ball | Storm R2X Solid Reactive | June 2023 |
| Storm IQ Tour Pink Overseas Bowling Ball | Storm R2S Hybrid Reactive | May 2022 |
| Storm IQ Tour Dark Green Overseas Bowling Ball | Storm Reactor XG Pearl | June 2023 |
| Storm IQ Galaxy Overseas Bowling Ball | Storm NRG-2 Pearl Reactive | December 2022 |
| Storm IQ Tour Purple Overseas Bowling Ball | Storm R2S Pro Pearl Reactive | June 2022 |
Where the Storm C3 Centripetal Control 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 A.I. Core
This core 1 Nearest cores Other cores
| Core | Brand | Shape | RG | Diff | vs this core |
|---|---|---|---|---|---|
|
|
Storm | Symmetric | 2.480 | 0.031 | RG −0.010 · Diff +0.002 |
|
|
Radical | Symmetric | 2.483 | 0.032 | RG −0.007 · Diff +0.003 |
|
|
DV8 | Symmetric | 2.471 | 0.028 | RG −0.019 · Diff −0.001 |
|
|
Motiv | Symmetric | 2.480 | 0.034 | RG −0.010 · Diff +0.005 |
|
|
Hammer | Asymmetric | 2.500 | 0.034 | RG +0.010 · Diff +0.005 |
|
|
Roto Grip | Asymmetric | 2.480 | 0.034 | RG −0.010 · 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 Centripetal Control Core3 of the 23 balls with the Storm C3 Centripetal Control Core are in stock at BowlersMart. Same core, different covers: pick the cover for the lanes you bowl on.Solid coversSolid covers grip the lane soonest and suit heavier oil.
Questions bowlers ask
What is the RG of the Storm C3 Centripetal Control Core?
At 15 lb the Storm C3 Centripetal Control Core has an RG of 2.490. It ranges from 2.490 to 2.650 across the listed weights.
What is the 14 lb RG of the Storm C3 Centripetal Control Core?
At 14 lb the RG is 2.540.
What is the differential of the Storm C3 Centripetal Control Core?
At 15 lb the differential is 0.029. This is a symmetric core, so mass bias is not applicable.
Which bowling balls use the Storm C3 Centripetal Control Core?
Storm IQ Tour Sapphire Bowling Ball, Storm IQ Tour 78/U Bowling Ball, Storm IQ Tour Bowling Ball, Storm IQ Super G Overseas Bowling Ball, Storm IQ Tour Ruby Bowling Ball. 3 are in stock now.
How do the Storm C3 Centripetal Control Core specs change by weight?
At 16 lb: RG 2.490, differential 0.035. At 12 lb: RG 2.650, differential 0.035.
How does the Storm C3 Centripetal Control 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 shown on BowlersMart’s original Storm C3 Centripetal Control core page (2022), 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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