Can anyone give me a quick rundown of the differences between a 'dirt jump' frame and a maybe a xc hard-tail. I check craigslist all the time, seeing what people are selling, and a guy has a Rocky mountain flow frame. I'm not really interested in buying it, just wondering what really sets this apart from a run-of-the-mill hard-tail.




Looking at one built up, the geometry doesn't look all too different. What gives?