Mounting headlight on V-Rex f-der post
I've wanted to mount the headlights on my V-Rex on the front derailler
hanger post, but couldn't find a good way to do so, so I designed my
This is how it looks all set up.
First, I decided that a Minoura Space Grip would probably work well as
the mounting point, but the derailler post was too big around for the
bracket to mount. It was also too wide to fit between the cranks.
I decided to make my own mounting hardware. I went to the hardware
store and purchased a 1" diameter rubber plug (it tapers down a little
bit at one end), a t-nut (look in the furniture area, they're used to
put threads for feet at the bottom of table/chair legs), a 1/2" PVC
pipe plug, a washer, and a allen head bolt.
UPDATE: The rubber plug finally rotted out and wasn't all that useful
after a few years. I found that by replacing the rubber plug
with TWO plugs (and a longer bolt) make the whole setup
SIGNIFICANTLY more stable. The headlight used to move around a
bit, but now it's rock solid!
The parts laid out for assembly
I drilled a hole down the center of the PVC plug and the rubber plug,
put a washer over the bolt, threaded the bolt through the PVC plug,
then through the rubber plug, then put the t-nut at the very end. The
threaded portion of the t-nut pulled into the hole drilled in the
rubber plug, and the sharp pointed teeth dug into the rubber plug so
that when I tighten the bolt to expand the rubber the t-nut will not
Once I had assembled these peices I wrapped some old inner tube around
the PVC plug and mounted the space grip.
The space grip mounted to my expander plug
Now that this was assembled, I used a tubing cutter to cut 1/2 inch off
each end of the space grip.
The space grip is now short enough to clear the cranks
After mounting the lights, I put the whole assembly on the bike, and
here it is:
Installed on the bike, top view
I hope this helps. If you have any questions or comments about this
setup, please post them in the forums.