Durabi (dur-AH-bee): a durable, two-wheeled vehicle.
Durabi was almost definitely inspired by this reconnaissance vehicle, a variant of which I got to interact with (and may have actually driven; I can't remember exactly) while at the 2012 FTC World Championship in St. Louis. In the interest of making a truly exclusively two-wheeled vehicle, I abandoned the stabilizer used by Durabi's real-world counterpart for a low center of gravity. I crammed as many pieces as I could below the center of the creation as ballast, even using LEGO magnets, one of the few metal pieces LEGO has produced. The result was a very fun to drive, unique, and fairly robust LEGO creation.