- In the past I have used an external clamp but found this
to be a lot lighter and easier to make. All the
commercial ones I've seen that have this also have 2 so I
may have to add another if this lets the boom slip.
(hasn't as yet) A long nut is welded
to the tube then both split down the centre. The thread
on one side is then drilled out.
- Using a car exhaust bracket. The main boom is cut as an +
at the end to give it enough 'give' so it will clamp onto
the front adjustable tube and an exhaust clamp used to
hold it tight. On some pipes there is a joining ridge up
the center and this can be taken advantage of to stop the
tubes rotating. A similar size groove is ground into the
mating tube so it will only slide in and out. I ground
mine at a slight angle to fix the tubes tighter. The
front section is slid in at a slight angle (where the
groove and ride meet) and when the right distance is
reached, it's rotated straight which almost locks it
solid. This makes for a solid mount as there is quite a
lot of stress here when pedaling.
Thursday, 29 January 2009