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Storm !Q Tour Sapphire specs
The Storm !Q Tour Sapphire is a pearl reactive ball with the C3C 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 | R2S Pearl |
|---|---|
| Cover type | Pearl reactive |
| Core (weight block) | C3C |
| Core type | Symmetric |
| RG | 2.490 |
| Differential | 0.035 |
| Factory finish | Power Edge |
| Flare potential (maker) | Medium-Low |
| Maker's category | Master |
| Color | Sapphire |
| Release date (maker) | 08/07/26 |
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 2.490. That is lower than 57% of the 134 current reactive and urethane balls in our table, so it sits on the low side. Storm says "a low RG ball will rev up quickly and roll smoothly."
Differential 0.035. Higher than 18% 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 Hyper Venom: RG 2.480, differential 0.034
- Motiv Venom Hysteria: RG 2.480, differential 0.034
- Storm Ion Pro Pearl: RG 2.470, differential 0.035
- Track Kinetic Sapphire Ice: RG 2.480, differential 0.040
Sources: Storm product page; Storm, "Inside The Bowling Ball"; Storm, "The Coverstock"; bowling.com coverstock FAQ; USBC Equipment Specifications Manual.