Originally Posted by
Not4you
If I had to guess, it is a very old bike, or a department store bike, trying to me a modern street ramp / skatepark bike. The really low and tilted seat position is meant to keep it out of the way when doing tricks on the ramps, you really only sit on it when not moving (resting). The clues that make me think it is a cheap department store bike is that it has one piece cranks and a pretty large chain ring. Newer high end ramp bikes will have 3 piece cranks and a really small chain ring (the small chain ring is used so that you do not catch it when dropping in on a steep ramp). The clues that make me think it is pretty old are that it has a chrome fork and dirt treads on the tires.
If you wanted to know what brand it is, or what year it is from (assuming that it is pretty old) you could check the numbers that should be stamped under the bottom bracket in the database on BMXmuseum.com or look though the database for a distinguishing feature - I'd start with looking for bikes that have the same join where the top tube and fat down tube meet the head tube.
But ultimately what it is or what you paid for it is irrelevant if it is getting you back into a sport that you are enjoying. Rip it around and have fun!!