Touring Kona Unit 2-9, the ultimate tourer? I’ve reached D-1. Most people omit half of the answer to the question “how many bikes do I need?”, only saying that you need N+1 bikes, where N is the number of bikes you currently have.
Theory The one bit of bike geometry that matters Bike geometry is a whole giant rabbit warren, and should you want to study it, all power to you. However, if you just want to get a bike that rides really well there's one bit of bike geometry that you should pay attention to: the seat tube angle.