[nichpr]

Skip, did you select f20 and 1/40th before you took the shot? If your objective was to show motion in the wheel, then the bg would have to be sharp to show the blurred wheel against it. Here the wheel blur is lost in the bg blur.
At f20, you certainly had room to move to a faster aperture and still retain enough DOF to keep the expanse of wall in focus. Or use a ND filter or CP to slow things down. I'm guessing that the bright sky in the TRH corner fooled the cam into a faster shutter than it would have had you cropped it out of the frame.
Of course, in hindsight, we all know the answer is a tripod.
Bottom line - nice try but no cigar on this one.