IMO a "cyclist" rides a human powered machine, a "biker" rides a motorcycle.
A "bike rider" could go either way.
The "mountain-biker" should be a "mountain cyclist" then, but maybe that implies a road cyclist who likes to ride mountain roads, as opposed to off road?
Big picture, it doesn't really matter much.
Rick / OCRR
Last edited by Rick@OCRR; 12-08-10 at 02:23 PM.