When spring has arrived, we have much more energy for each day activities. We’re doing renovations in our houses, decorating the garden, sometimes also going for a longer weekend trip to the mountain. But the most people begin to exercising. They are going to the gym, practicing Yoga, having great fun on the tennis court. When you don’t have to much time for any tasks like that, and you still want to get in shape, you could begin to use a bicycle. But not normal one – you have to design your own bike!