Folding and Electric Bikes. Dahon and A2B the best bikes around and so much fun. One of the best parts about the folding bikes is that it is fun to ride, easy to store and very convenient. The new A2b from Ultra Motor is one of the best biking experinces I have ever had. It is powerful, tecnolgically advanced and looks like a motorcycle. People will defentely look twice at you while riding the A2B.