I love the colors and motion blurs in the background and in the wheels.
Great photo, fits the challenge nicely.
I wish it has been just a tiny bit more brighter though. 8
nice concept, probably pretty difficult to shoot, but the biker is still blurry himself somewhat, also it's really centered, it could have benefitted from some other background element included in the composition if possible. If I could vote on this though I'd give a 7.