Ebonite The One Urethane 78D, released in 2025, pairs the Solid Urethane 78D cover with the Centrex Symmetrical Mass Bias core. It measures RG 2.47 and differential .056 — low RG (revs up early) and high flare potential, banded on Storm's published scale. It leaves the factory at 500/1000 Siaair Micro Pad.
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No per-weight measurements on record for this model — the headline specs above are the manufacturer's published numbers.
Colours this model was released in. A used ball's actual finish is whatever its listing photos show.
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 The One Urethane 78D appears here.