1. What exactly is this thing?
It's a way to hold a chaintube in place on a chain, in a way that lets the
chaintube float up, down, and sideways with the chain while staying in position
front to back. The idea is that the chaintube only rides lightly on the chain,
covering the chain where it needs to be covered, and keeping the chain from
going crazy without dragging on it in normal operations.
2. OK, I get it, but how does it work?
As it turns out, the heart of the mount is diabolically simple- it's a
section of bicycle chain, turned sideways. Really. After looking high and low
for all sorts of industrial materials to accomplish this action, we came back to
bike chain. It worked the best of all, but it needed something to make it
prettier and keep it from touching things it shouldn't. So we hid it away and
protected it from rubbing on anything with a nylon packcloth sleeve.
What makes it all work is the laser cut stainless L brackets attached to each
end. One attaches to your bike, and the other attaches to the chaintube.
In the most common configuration, both ends attach with a pair of zipties. We
also have an alternative configuration where one end attaches with a Cateye
clamp. While the Cateye clamp could go on either end, most people usually put in
the bike frame side.
3. Tell me more about mounting. For instance, where do I put it?
The first consideration is where the chaintube needs to be. Generally,
that's where the chain goes close to your fork, or the crossarm of your trike,
or some other part of your frame. Where the mount goes depends on what is within
the reach of the flexible chain assembly. It has a reach of 4.5 inches (11.4cm),
so there are probably lots of places it will work. The chaintube can be attached
anywhere along it's length (front, back, middle, etc.).
If the place on the frame where you are attaching the mount is at a very
different angle than the chain, the L brackets are designed to be adjusted by
bending to get the matching angle.
There are notches in the stainless L brackets to catch the zipties so
everything stays secure. We put foam cushioning tape on the frame side L bracket
to protect your paint.
4. Can I use any chain tube, like the tube I already have?
Yes. We recommend using a low noise, soft, slippery plastic. The material we
use is quiet, slippery, and very abrasion resistant. Flaring the ends helps with
noise quite a bit.
5. It seems crazy that such a simple thing could be the solution to my noisy
Yes, it does. There are some other things you don't want to overlook, like
the type of material the chaintube is made out of, and keeping the tube as short
as you reasonably can, but yes, this is often the key missing piece to finally
making your chaintubes quiet.