When spring has arrived, we have a lot more energy for everyday activities. We are doing overhauls in our houses, decorating the garden, sometimes also going for a short trip to the mountain. But the most humans start to exercising. They are going to the gym, practicing Yoga, having great time on the tennis court. When you don’t have to much time for any tasks like that, but you still like to stay in shape, you should begin to ride a bicycle. But not regular one – so design your own bike!