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Track Kinetic Sapphire Ice specs
The Track Kinetic Sapphire Ice is a pearl reactive ball with the Shuttle 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 | Prime Response Pearl (HK22) |
|---|---|
| Cover type | Pearl reactive |
| Core (weight block) | Shuttle |
| Core type | Not stated |
| RG | 2.480 |
| Differential | 0.040 |
| Mass bias / intermediate diff. | 0.006 |
| Factory finish | 500, 1000, 1500 Siaair / Factory Compound |
| Maker's category | Mid |
| Color | Purple / Sky Blue / White |
| Weights | 16-12 Pounds |
| Release date (maker) | April 16, 2026 |
Numbers as Track publishes them, checked 21 October 2026. Published for a 15-pound ball. 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 2.480. That is lower than 65% 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 0.040. Higher than 35% 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.
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 Track.
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
- Storm !Q Tour Sapphire: RG 2.490, differential 0.035
Sources: Track product page; Storm, "Inside The Bowling Ball"; Storm, "The Coverstock"; bowling.com coverstock FAQ; USBC Equipment Specifications Manual.