A Harley Davidson motorcycle with two wheels at the back is commonly referred to as a "Harley Davidson Softail Breakout." The Softail Breakout is a specific model within the Harley Davidson lineup that features a distinctive rear-wheel design with two wheels positioned close together. This configuration creates a unique aesthetic while maintaining the classic Harley Davidson motorcycle style. It's worth noting that the availability and specific models may vary, as Harley Davidson regularly updates and introduces new motorcycles to their lineup.