TBerk said:- Handle bars and it turns with the steering OR
- Front Head Tube and it points straight ahead (most of the time.
anyway).
I am of a mind to think option #2 is gaining merit in my mind. Having
the light turn with the handlebars makes sense to get those corners
lit during late night highspeed runs ;]) but it am getting annoyed
in my 'old age' w/ the shaking and waving back and forth with the
normal to and fro of, say, hands free riding.
Oh course I am stacking cordwood here for a flamewar, so I apologize
in advance.
Some of this may come down to wide beam vs spot light and the
practical aspects of being able to actually see at night.
TBerk
I've got lights on several bikes. The height of the light varies from
about 12" (on one of my folding bikes) to about four feet (on my
touring bike).
None of them are fixed to the frame. All are mounted on either forks,
handlebars, or a front rack.
IME, the best height is about 24" (just slightly lower than the top of
a wheel). The best position of all is on a rack (or perhaps a front
fender, if metal) out in front of the tire.
Putting it higher gives more chance for reflected light into my eyes
(especially if there's fog) and doesn't do as good a job of showing
relief in the road (potholes & bumps). Putting it lower make it's
tilt angle more sensitive; it's harder to have the beam skimming the
pavement to the right degree. (As a thought experiment, a lamp right
at road level would brilliantly show every dimple in the road with its
shadow, but would show nothing of the road if its angle didn't
precisely match the road.)
One folder has it mounted to the fork crown on a slight vertical
extension. This works well. My touring bike has it mounted on the
front of an aero bar, hanging down. Not quite as good. My commuter
has it on the front of a homebuilt rack, definitely best. And BTW,
when I do mount one on the handlebar, I hang it below the bar, not
above it, if at all possible.
- Frank Krygowski