Oh, the street race...the "real world" race where everyone runs their quads on pavement?
I never said that just pointing out that yoyo's statement isn't accurate. And you asked what challenge so I provided you what challenge. No matter how relavent or irrelevant the challenge nobody wanted to run on pavement. When my bike is done ill run on whatever surface anyone wants to run on because in the real world people race on everything from ice to sand and all surfaces in between. I also don't care if I lose no matter how fast you are there's always someone faster just a matter of time till you find them.