In May days are getting warmer and spring might be felt up in the air. Humans are more often leave their apartments just to be outside. They are trying some exercises like running or yoga on the balcony. Another ones are wanting to select a bicykle as their major mode of transportation. Do you like to be one of them but you don't have your own vehicle? Not a big deal, there are plenty of stores where you could buy one in reasonable prize, like at the internet or local shop. Also, you may design your own bike.