Raph riding the stealth bike.

The Stealth Bike is a specialized motorcycle that can be launched from the front of the Shell Raiser. It has the ability to hide itself behind asphalt plating on its back with the push of a button. This makes the Stealth Bike look like a part of the road from above and adds to its "stealth" factor. It made its first appearance in the episode Cockroach Terminator.

The Stealth bike on it's action figure form

Although the Stealth Bike is primarly seen as Raph's vechicle, other turtles have had a chance to ride it. Like Donatello in Pulverizer Returns, and Leonardo in Enemy of my Enemy. Mikey is the only turtle who hasn't driven or went in it.