It's called a mod trials bike. The sport is kinda related to things like moto-trials or hill climb in that it involves obstacles (both natural and man made) that you are supposed to get over without ever touching down. It's real stinkin' hard. Two types, stock (26" wheels big mountain bike sized bike) and mod (20" wheels bmx sized bike). I could post a vid link if there's interest...
Me and two other guys got a website: midwestbiketrials.com an all that (started to get us free parts, but yea!)
Here's pics of my new bike
