Here is another compact exercise bike that gives your legs a good workout. The SF-B020026 Magnetic Mini Exercise Bike from Sunny Health & Fitness comes with a digital monitor to track your time, speed, distance, and calories burned. It has rubberized suction cups, so it stays put.
This bike has 8 levels of magnetic resistance. Its pedals can also be used for arm workouts. A convenient carry handle is available for portability.