This article is about a/an rider in Kamen Rider W.

Kamen Rider Double CycloneAccelXtreme (仮面ライダーWサイクロンアクセルエクストリーム Kamen Raidā Daburu Saikuron Akuseru Ekusutorīmu) (also shortened to WCAX) is a hypothetical combined form of Kamen Riders Double and Accel which was envisioned in episode 43 of Kamen Rider W. It later appeared in Kamen Rider: Climax Heroes OOO.


Ryu Terui

A Superintendent appointed to the Futo Police Department, providing the 'body'. Ryu is normally a Kamen Rider on his own as Kamen Rider Accel.


The right half of Double, providing the 'mind'.

Video Game appearances

Kamen Rider: Climax Heroes OOO

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Kamen Rider Double CycloneAccelXtreme is available as a playable character in the game Kamen Rider: Climax Heroes OOO.




CycloneAccelXtreme (サイクロンアクセルエクストリーム Saikuron Akuseru Ekusutorīmu) is a form of Kamen Rider Double described by Shroud as being the ultimate form, with the change being that Ryu Terui becomes one with Philip instead of Shotaro, as their physiology make them immune to the psychological attacks of the Old and Terror Dopants. Shroud states that Ryu's hatred and rage is needed for Double to fight at its full potential. However this form was never utilized in the series as Ryu decides not to fight as part of this form while showing Shroud that they can fight with compassion rather than hatred.




  • Maximum Slots - Gaia Memory slot that enables Double to perform Maximum Drive as barehanded.
    • Prism Bicker - Personal sword and shield weapon normally used by Double CycloneJokerXtreme.
    • Engine Blade - Personal sword weapon normally used by Accel.



Magazine scan of Kamen Rider Double CycloneAccelXtreme

  • Although Shroud stated that hatred and rage is what would allow Double to fight at their fullest potential, this may not be true as Shotaro and Philip have shown when they transformed into CycloneJokerGoldXtreme through wind blowing into the Xtreme Memory and hope from the citizens of Futo.


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