This is terrific. The lighting and compostition are spot on. What appears to be exposed butt-crack is perhaps a little distracting, but you cant have it all your own way. 8.
Fit Challenge Criteria: 1/2
Contast/Color: 1/2
Composotion: 1/2
Photo Quality: 1/2
My Personal Affinity: 0/2
The negative space does not contain anything that I fell really supports the main subject, not does it contain anything so interesting that I am "wowed" by it. The photo is a bit too contrasty IMHO. The biker is placed well in the frame, but the exclusion of anything else to really tell the story makes this shot miss something. I think moving back and including an empty street, maybe the lightpost, and the long shadow of the bike would have helped out significantly.