>I'm sure Chuck is kidding here ... I've never seen a brake mounted
>to the rear of a fork crown,
Here's one:
<A HREF="http://www.velostuf.com/chris_kvale_cycles.htm">Chris Kvale Frames
</A>
http://www.velostuf.com/
(bottom of page). This bike is also unusual in that the front and rear brakes seem to operate in unison from one lever.
I've seen others... always on time trial bikes. Not good for general use as the arm limits how much you can turn the handlebars.
Bob Hovey
Columbus, GA