Although it doesn't serve any functional purpose, a nice headtube badge can really make a bike feel special. Much like Jaguar or Rolls Royce in the car world, some brands go all-out and manufacture a plaque for the front of the bike, whereas for others, it's can be a graphic included in the paint job.
Whatever the case, do it right and it should make your bike instantly recognisable. Below are 25 headtube badges to take a guess at. The quiz starts easy but will get harder as you go through. Any brand names in the headbadges have been blurred out so you can just read the answer. Let us know how you got on in the comments at the bottom of the quiz.