Trailer-Hou

1="(Shift Car/Signal Bike/Viral Core)-Hou!"

- Shift Car/Signal Bike/Viral Core insertion announcement

2="Hissatsu! Full Throttle: Full Full (Shift Car/Signal Bike/Viral Core) Dai-Hou!"

- Finisher announcement w/ Shift Formula, Tire Exchange Shift Car, Signal Bike, or Viral Core

3="Hissatsu! Full Throttle: Full Full (Shift Car) Big Dai-Hou!"

- Finisher announcement w/ any other Type Change Shift Car

The Trailer-Hou (トレーラー砲) is Kamen Rider Drive's rifle-like weapon utilized when he assumes Type Formula, though he can also wield it as Type Tridoron. It first appears in episode 22.

Like the Handle-Ken and Door-Ju, Shinnosuke names this weapon based on what it resembles: a semi truck, with the trailer section consisting a lot of its bulk. Similar to the Shift Cars and Signal Bikes, the Trailer-Hou is also sentient where it is powered by a specialized Core Driviar called the Core Driviar-TH (コア・ドライビア-TH).

Usage
The Trailer-Hou can interchange between its Trailer Mode (トレーラーモード) and Cannon Mode (大砲モード) simply by pulling down the Flame Rear Grip (フレームリアグリップ).

In Trailer Mode, the Trailer-Hou not only houses Shift Formula inside of its Shift Container Barrel (シフトコンテナバレル), but is spacious enough to contain all of the Tire Exchange Shift Cars as well. It also utilizes a small visor called the Trailer Searcher (トレーラーサーチャー) for various purposes: searching for either Drive or Roidmudes, generating tracks in midair (being so huge, the Trailer-Hou has to generate three lanes worth of Shift Car tracks), and firing bullets from its front sides. While moving, its Generator Chassis (ジェネレーターシャーシ) tires can provide protection from Super Heavy Accelerations and its Wall Metal Body (ウォールメタルボディ) hard body can resist multiple impacts and damages.

In Cannon Mode, the Trailer-Hou can fire high output blue energy blasts. If Drive loads a Shift Car into its Shift Landing Slot (シフトランディングスロット) on top of the barrel, it announces the loaded Shift Car's name (either the form name of a Type Change Shift Car or the last name of a Tire Exchange Shift Car) followed by "Hou" (砲) and allows him to fire other colored energy projectiles based on said Shift Car.
 * Shift Formula: Formula-Hou (フォーミュラ砲)
 * Shift Speed: Speed-Hou (スピード砲)
 * Shift Technic: Technic-Hou (テクニック砲)

Finishing attack
The Trailer-Hou's Full Throttle finisher Trailer Impact (トレーラーインパクト) is activated when Drive loads two of his Shift Cars (or one in the case of Shift Tridoron) into its Shutter Gate Panel (シャッターゲートパネル) within the Shift Container Barrel, which causes the Side Gauge Window (サイドゲージウィンドウ) to display the word "FULL" once the second Shift Car is inserted (or when Shift Tridoron is loaded by itself), before he pulls the Full Throttle Trigger (フルスロットルトリガー). This attack has many different variations depending on which Shift Car Drive uses in the Shift Landing Slot along with which two Shift Cars he uses in the Shutter Gate Panel.

If Drive initiates the Trailer Impact in Type Tridoron, he will revert back to a weaker Type depending on which Type Change Shift Car he uses in the Shift Landing Slot. This most likely has to do with Shift Tridoron being originally created as an emergency finishing move to fire Tridoron as a bullet fueled by the energy of all the other Shift Cars.
 * Formula-Hou
 * Shift Speed & Shift Wild: Fires a blue energy blast.
 * Mantarn F01 & Jacky F02: Fires a blue energy blast.
 * Shift Speed & Midnight Shadow: Fires rapid energy bullets.
 * Mantarn F01 & Sparner F03: Fires a blue energy beam.
 * Jacky F02 & Sparner F03: Fires a blue energy stream.
 * Speed-Hou
 * Shift Tridoron: Fires the Tridoron in Type Speed, which is strong enough to destroy even a Super Evolved Roidmude.
 * Technic-Hou
 * Shift Tridoron: Fires the Tridoron in Type Technic, which defuses the Fusion Minor upon contact.

Gallery
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