Recumbent bicycles

gistfile1.rb

class Recumbent < Bicycle
  attr_reader :flag
  
  def post_initialize(args)
    @flat = args[:flag]
  end

  def local_spares
    {flag: flag}
  end

  def default_chain
    '9-speed'
  end

  def default_tire_size
    '28'
  end
end

Ok, I think I get this now. I like the idea of thinking about what you can see from inside a class. And also the way you describe the "space between objects". You have an excellent way with words!