Being new to the forums I need some help understanding the difference between a rat bike, a klunker and a cruiser. What features differentiates each categories. Pics would be helpful too. I have a '69 Schwinn mens cruiser that is in rough shape and I am trying to decide which way to go. I think it is a Typhoon, but not sure. The words on chain guard have faded beyond readability. How can I tell the model for sure?