Sun Bicycles Classic Unicycle (18-inch)

For "fun on one," look to Sun's Classic Unicycle. The steel frame sports a classic unicrown design and is built for excellent strength and reliability. Plus, the wheel spins on sealed bearings for durability, while the quick-release seatpost makes seat adjustments a snap. And speaking of seats, the Classic's offers top-notch comfort, balance, and bumpers to protect it, too.