Anime: The Gantz Monowheel.

Mad, bad and just plain dangerous-The Gantz Bike.

Wiki:

"Gantz (ガンツ ) is a manga and anime series written by Hiroya Oku. Gantz tells the story of a teenager named Kei Kurono who dies in a train accident and becomes part of a semi-posthumous "game" in which he and several other recently deceased people are forced to hunt down and kill aliens. The missions they embark upon are often dangerous. Many die--again--on each mission.

After the initial death of our heroes, they are transported to a room with a featureless black sphere called "Gantz". After a short amount of time, a postwar Japanese exercise radio begins to play from the sphere. Green text that appears on the surface of the sphere, and Gantz informs those present that their lives have ended-"Your lives have ended. What you do with your new lives is entirely up to me. That's the theory, anyway." The sphere then opens up to reveal suits that, when worn, amplify the user's attributes, such as strength, speed and agility. Along with the suits are various high-tech weapons with different uses for different situations

The Gantz Bike is a monowheel and the only vehicle provided by Gantz. It does not possess any attack ability, but can travel at a great velocity...."