This is a nicely composed, well lit shot that definitely meets the challenge. It's also rather small. There's a tutorial on how to size your pictures for DPC so you get the maximum size allowable:
//www.dpchallenge.com/tutorial.php?TUTORIAL_ID=26
I'm sure that you are getting a lot of comments admonishing you for the small image size. To score your best, it is important to submit the photo at the maximum size allowable. I zoomed in 200% to get the image to a comparable size to the rest of the field. I didn't see where the focus is here (maybe because of the zoom though) which also takes it down a little. On the good side, I like your composition, shooting from the rear of the bike with the front tire turned for a profile view as a backdrop to the rest of the bike.