Almost by analogy with my previous OP, how do the terms "bike rider", cycler", and "cyclist" differ in current AmE usage to describe someone that rides or travels by bicycle?
My impression is that "cyclist" and the less common "cycler" both refer to those involved in cycling as a competitive racing sport, i.e. Tour de France cyclists.
"Bike rider", on the other hand, sounds more like a generic term which embraces professional and occasional, nonprofessional weekend/vacation cyclists, but also might encompass motorcyclists.
Also, does the term "biker" have any currency in modern day AmE to refer to a bicycle rider, or to bike riders in general (cyclists and motorcyclists), or is it used specifically to describe a certain type of motorcyclists, like those traveling on big, heavy HD style "hogs", or belonging to an organized club or gang?
http://www.thefreedictionary.com/cyclist