Rat Rod category is not a large at all. People just misuse that word left right and center. The category that is large is "Rodding", which includes, but not limited to, Hot Rods (traditional style that includes, among other things, matt black rods), Street Rods (Shiny with modern engines, interiors, and suspensions , and Rat Rods (which are the rods designed to look outrageous as well as if they are built on extremely low budget with parts found at junk yard. These are also not designed to be very derivable). 95% if the time the term Rat Rod is used to describe a regular Hot Rod. BTW the term "Rat Rod" is shunned among most hot rodders.