Frequently Asked Questions-
1. How do I know if an Accessory Mount will work on my bike?
As long as you have a round or nearly round tube to attach to that is less
than 1-3/8in (35mm) you should be able to attach an Accessory Mount to it. You
will need two points of attachment, one for each leg of the mount. The two
points don't have to be on the same tube, and the distance between the two
points can vary quite a bit. Most people put their mounts on the same tube with
the mounting points 2-3 inches (5-8cm) apart. Depending on the particular
situation and the things you have to work around, all kinds of things are
2. How easy is it to install?
If you are just attaching it to a single, unobstructed tube, it's super
simple. We use Cateye brand plastic band clamps for attachment. We modify them
to add a metal bushing to move the mounting point out to half the width of the
Accessory Mount's mid tube. You simply snap the Cateye clamps around the tube on
your bike and attach the ends of the Accessory Mount arms to the Cateye clamps.
If there are things in the way, you can adjust the arms on the Accessory Mount
to work around them.
3. How strong are they?
Pretty strong. You could probably pick your bike up with them. The real
question is "How much weight can they take?". They can easily take a
light, or a GPS, or a phone, or a mirror. They can take two lights as long as
they aren't both big heavy ones with giant batteries inside.
The Accessory Mount arms form a triangle with the tube they are mounted on.
The base of the triangle determines the stiffness. As long as the ends of the
arms aren't super close together (less than an inch and a half, or 4cm or so),
the triangle will be very stiff.
4. What size range of tube can I attach to?
Cateye clamps come in sizes from 1/2 inch (12mm) to 1-3/8 inch (35mm) in 1/8
inch (3mm) increments. They come with shims to let you fine tune the fit within
that range. To clamp to things smaller than 1/2 inch, we recommend using a
rubber shim. McMaster-Carr sells thick wall rubber tubes with 1 inch outer
diameters and inner diameters down to 1/4 inch (1cm). A short section of
material like this, sliced into a C shape, works great. We keep several sizes of
this material in stock and can cut shims for a nominal fee.
5. Can I attach to things that are not round?
It depends. The Cateye clamps can handle some ovalization, to around a 2 to 3
ratio of width to depth. You can sometimes use a larger clamp and shim the
thinner part of the oval. It is also possible to attach the ends of the
Accessory Mount arms to something else- a bottle boss, a brake boss, all kinds
of things. There are also other clamps that may handle strongly oval tubes
better, like P clips, though they aren't as stable as the Cateye clamps.
6. Can I get a wider tube across the middle? I want to attach lots of stuff.
The tube across the middle is 30mm wide. We have 15mm extensions that can be
added to the outside of the mount. It is possible to replace the tube in the
middle with something wider, but all the widths of everything else also change.
It's been done, and with good results, but it takes a bit of fiddling to do it.
The extensions are very easy.
7. Can I mount my European light that's designed to attach to a tab with a
Yes, we make a tab style mount that goes on the end of the Accessory Mount.
You can add up to two.
8. Which arms do I need?
For most recumbent applications, we recommend the 50x75mm or 75x100 arm combinations. The different length arms give a lot of versatility. If you want more room, or to get things further away from the frame, go for the 75x100mm version. On upright bicyle stem mounting applications, we recommend the 75x100mm or 100x100mm arm combinations for maximum range. If you are mounting on a fork blade, we recommend the 50x75mm setup. For some Highracer Recumbents, the 100x100mm combination allows you to put a light down low and right in front of the BB shell.