Expand (エキスパンド, Ekisupando) is a Disc Frame released by Takara Tomy and Hasbro as part of the Burst System as well as the Cho-Z Layer System and SlingShock System. It debuted in Japan with the release of the B-130 Random Booster Vol. 13 Air Knight.12E.Et on December 27th, 2018. It later debuted in western countries with the release of the SlingShock Starter Pack Air Knight K4 12Expand Eternal-S.
Expand is a round, wide Disc Frame with four smooth blades, with six gaps in total. This design, like the Maximum Garuda and Air Knight Energy Layers, is intended to produce Upper Force. In theory this Upper Force will help "lift" the Beyblade, lowering friction between the Performance Tip and the stadium floor to improve Stamina. In practice however, the blades instead create air resistance when spinning and slow the Beyblade down. The round design of Expand creates high Stamina and Life-After-Death (LAD), as its wide shape prevents the Energy Layer from touching the stadium floor when the Beyblade is tilting. Its LAD capabilities are comparable to those of other popular Disc Frames such as Cross, Glaive and Proof.
As such, Expand is a must have for competitive bladers.
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