Track Theorem Pearl, released in 2024, pairs the Prime Response Pearl ( HK22) cover with an asymmetric MC 2 Asym core. It measures RG 2.47 and differential .046 — low RG (revs up early) and medium flare potential, banded on Storm's published scale. It leaves the factory at 500, 1000, 1500 Siaair / Factory Compound.
Measured at 15 lb. These are box specs for an undrilled ball — drilling changes them.
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Brand vocabulary, not measurements — no two manufacturers use the same scale, so these never compare across brands.
| Weight | RG | Diff | Int. |
|---|---|---|---|
| 12 lb | 2.59 | 0.041 | 0.014 |
| 13 lb | 2.60 | 0.041 | 0.014 |
| 14 lb | 2.49 | 0.046 | 0.017 |
| 15 lb | 2.47 | 0.046 | 0.017 |
| 16 lb | 2.48 | 0.044 | 0.017 |
These specs are factory reference for the model, compiled from manufacturer publications and other sources and provided as is. They may contain errors or describe a different production run, and they say nothing about the condition of any individual used ball — surface prep, resurfacing, plugging, and drilling all change how a ball behaves relative to its published numbers. Spotted something wrong? Tell us at support@rerackbowling.com.
The Ball Finder matches your rev rate, speed, and lane condition against these specs. Buy and sell used on ReRack — your payment is held until the ball is delivered.
Closest on the three specs that compare across brands — RG, differential and symmetry. One ball per line, so no other version of the Theorem Pearl appears here.