Motiv Shadow Tank specs

The Motiv Shadow Tank is a bowling ball with the Flux™ Symmetric 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	Frixion™ M7 Pearl MCP
Cover type	Other
Core (weight block)	Flux™ Symmetric
Core type	Symmetric
RG	2.570
Differential	0.015
Factory finish	1000 Grit LSS
Flare potential (maker)	2"+
Maker's category	Light Oil
Weights	14, 15, 16

Numbers as Motiv 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

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 Motiv.

Balls with similar numbers

Same cover type, closest RG and differential in our table:

Hammer Nu 2.0: RG 2.586, differential 0.027
Ebonite Turbo X NU: RG 2.517, differential 0.040

Sources: Motiv product page; Storm, "Inside The Bowling Ball"; Storm, "The Coverstock"; USBC Equipment Specifications Manual.