As per Ray's suggestion. I wanted to do it in my living room with a white background, but the living room is such a mess of stuff and there's barely room for the bike and setting up the back ground. So the color "b&w" with a dash of blue didn't work out. The shoes felt good and maybe transfer a little more power through the pedals.

(Today the gray background of this page has a purplish cast on my monitor. It's just about impossible to "calibrate" it by eye using Adobe Gamma. I don't know how other people do it.)

(Okay, four minutes later, it's back to gray.)