|This article is about a/an transformation device in Kamen Rider W.|
The Accel Driver was built by Shroud without any involvement from Museum for her own plans against them. The Driver was given to Ryu exclusively, who wanted revenge on the person responsible for murdering his family.
Unlike the other Memory Drivers, the Accel Driver is built specifically to be used with the Accel Memory, and later the Trial Memory. While it allows the user to be completely shielded from the Gaia Memory's corrupting effects, it does so at the cost of weakening the power of the Gaia Memory even further, just like how it is with the Double Driver. However, this is somewhat mitigated by the fact that the Accel Driver is specifically designed to only work only with these two Memories, harnessing their fullest potential, and use of the Engine Blade and Engine Memory, all of which allows functionalities of the Accel and Trial Memories to be used to the fullest, in order to compensate for the power loss suffered.
By inserting the Accel Memory into the Mono Slot (モノスロット Mono Surotto) and revving the Power Throttle (パワースロットル Pawā Surottoru) on the right handlebar, Ryu transforms into Kamen Rider Accel.
- By squeezing the Maximum Clutch Lever (マキシマムクラッチレバー Makishimamu Kuratchi Rebā) on the left handlebar of the Accel Driver and revving the Power Throttle, Kamen Rider Accel initiates his Accel Glanzer (アクセルグランツァー Akuseru Gurantsā) finisher: After charging up to a point when Accel is engulfed in orange flames, he executes a jumping spinning heel kick. This can be used with Double FangJoker's Fang Strizer to perform the Rider Twin Maximum (ライダーツインマキシマム Raidā Tsuin Makishimamu) finisher.
- In AccelTurbuler form, his finisher is the AccelTurbuler Phoenix (アクセルタービュラーフェニックス Akuseru Tāburā Fenikkusu): Accel pierces through his target while covered in flames forming the English letter A.
- In Kamen Rider W Forever: A to Z/The Gaia Memories of Fate, Bike Form has its own Maximum Drive after the Engine Memory is inserted in the Accel Driver and Accel switches to Bike Form: the Bike Engine Dasher, a super-powered dash through the target.
- The Accel Driver resembles a set of motorcycle handlebars.