I'm here to defend all bike riders. The bicycle is my choice of religious icon.
I'm sorry to drag us back into ground you've all covered on earlier threads, but I feel compelled to do so.
I took the popular images into photoshop, used crop tool, clicked the adjust image column of tools, changed the pixels per square inch from 72 pixles per inch to higher numbers ranging from 216 ppi to 600 ppi. I used the auto levels and auto contrast tools from the same column. These images are not altered except for a red circle I drew around an object of interest to me. Enhanced, not altered.