d-wheel
Japanese: D・ホイール (D-Wheel)
English: "Duel Runner"
Motorcycle-type Duel Disks in Yu-Gi-Oh! 5D's. Skateboard-type Duel Disks for children are called "Duel Board". They're used for a type of Duel called "Riding Duel (ライディングデユエル)" (in Japanese) or "Turbo Duel" (English).