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Galaxy Zeutron Z4 4 Liner-S is a Balance Type Beyblade released as part of the Burst System as well as the SlingShock System. It was released in western countries as a part of the Gold-X Betromoth B4 & Galaxy Zeutron Z4 Dual Pack.

Energy Layer - Galaxy Zeutron Z4

Main article: Energy Layer - Galaxy Zeutron Z4
Galaxy Zeutron Z4 is a Stamina Type Energy Layer that features four large blades, producing an overall rounded square design, as well as two faces on either side akin to its predecessor Zeutron Z2, meant to represent its Japanese namesake; Zeus, the god of thunder in Greek Mythology. As part of the God Layer System, Galaxy Zeus features a gimmick; it features four metal balls on tracks, like the two metal balls of its predecessor, Zeutron Z2.

Due to centrifugal force, the metal balls move outward in the tracks. In theory, this is meant to increase Outward Weight Distribution, Stamina, and stability. In practice, due to the increased number and weight of the balls and how much closer the tracks are to the edge of the Layer compared to its predecessor, Galaxy Zeus' gimmick works as intended, giving Galaxy Zeus Combinations longer spin times.

While the Takara Tomy release of Galaxy Zeus has teeth of only average length and a recoil inducing square shape akin to Wyvron W2, the Layer's metal balls and large blades gave the Layer a relatively high weight of 12.8 grams, which heavily bolsters its Burst Resistance. As a result, Galaxy Zeus had great Defense and Attack potential along with its Stamina, making it a once Top-Tier Layer for Balance Combinations.

Forge Disc - 4

Main article: Forge Disc - 4
4, like other even numbered Core Discs, is symmetrical and elliptical in shape in order to facilitate a Disc Frame. Each side features two protrusions, one molded into the shape of a "4" and the other molded into the shape of the Roman Numeral "IV". The protrusions extend further from the center more than other Core Discs which grants 4 high Outward Weight Distribution and subsequent Stamina potential. As a Core Disc, 4 is comparatively heavier than regular Forge Discs such as Heavy and Gravity which grants higher KO resistance and the ability to facilitate Disc Frames can add characteristics such as Life After Death with Cross or Glaive. While 7 has greater Stamina, 4's Stamina is still comparable.

Performance Tip - Liner-S

Main article: Performance Tip - Liner-S