Mafia Medusa 20 Inch Wheelie Bike - YellowBikelife Wheelie culture is blowing up world wide but until now, no companies had stepped up to facilitate the smaller riders making their way through the ranks. Medusa 20 now pioneers the featherweight division, hitting hard on the scene and delivering our superior experience and knowledge in a much smaller package. To inspire confidence, our designers foremost considerations were based on weight, geometry and ergonomics. Everything had to be fine