I think that it should be pointed out that at the time of the OP's photo, riding a bike was exclusively a pastime of the wealthy and the relative cost of a bike was well beyond the reach of your average person. By the 20's, the price had dropped considerably and came within the reach of a far larger portion of the population. By the late 30's it had become quite commonplace and the wealthy had almost exclusively left the sport and moved on to automobiles and other pursuits, leving the sport of cycling as a more general pursuit. It is quite funny how it is now once again beginning to attract people as a somewhat exclusive sport, with many wealthy people eschewing sports like golf for the high-end of cycling.