I love the color in this, the composition. Might have wished for more depth of field (though not much more, as the oof seat adds a sense of depth and dimension). Assuming a shallow depth of field was necessary, you picked the right focal point. Since the "sissy bar" is actually carrying the highlight of the image, it tends to draw the eye there, and then disappoints by being unsharp. After the basic editing limitations are gone, a subtle burn-down of that element so that it is not the brightest might be worth a try. But I really like the image overall, and it is a refreshing entry in the Bike challenge. 8
This sure brings back some memories. My first bike was a purple stingray, from Williams Cyclery on Long Island. Hmmm. I wonder if they are still in business?
I would've done some cropping and brought out some more sharpness in this photo. Cropping to bring the "tag" into a corner would make this look really sharp!