1. Can I use them on my bike? I don't think my tubes have slots, they just
have holes for the adjuster pin.
These clamps are designed for use without clamping slots. Each clamp has two
collar clamps built into one unit. One of the collar clamps is sized for the
outer tube, and the other collar clamp is sized for the inner tube. The outer
tube does not have to be squeezed down to grip the inner tube; the inner tube is
independently gripped by it's own clamp.
2. Are these strong enough? I'm a big rider.
Yes, no problem there. These clamps grip really well.
3. If clamps are such a good idea, why don't manufacturers use them?
Tradition, and cost. And, some manufacturers do use them, on their high end
4. Are they sold one at a time, or in pairs?
In pairs. It's the only reasonable way to do it.
5. How do I know which one to order?
It's important to know what tubing sizes you have. This isn't too difficult,
as the sizes go up in steps of 1/8 inch. If you can accurately measure or guess
the size of one tube, you can figure out the other one (it will be 1/8 inch
bigger or smaller). If you don't have a good way of measuring, you can print out measure your tubes
with our handy Tubing
6. Can I use them for anything else?
Any place you want to clamp two telescoping tubes together. We've used them
on a garden tool to turn a fixed handle into an extension handle, and it worked great! In particular, the 3/4 inch into 7/8 inch tube combination opens up some interesting possibilities in attaching accessories to handlebars, since handlebars are 7/8 inch at the ends.
If you’ve ever lost a grenade pin, you know how frustrating it can be to find something to put in there to get you home. You can kiss that worry goodbye. And if you’ve ever wondered if your seat would be a little more comfortable if you could just move it a little bit, but the spacing between the grenade pin holes is a little much, or you’ve run out of holes, well, that’s gone too. You can set your seat position to wherever you want it in as fine an increment as you’d like.
clamps slide on, then lock each tube independently. There are separate locking
bolts, one for each tube. The tubes
don’t need clamping slots or any other changes. You can adjust your seat
wherever you want it in as fine an increment as you’d like. If you ever
take your seat off, it will automatically go back to exactly where it was, because the clamps can stay in place on the smaller tube.
Since the clamps
lock the tubes completely, the back of the seat becomes much more rigid. This
improves comfort, handling, and pedaling efficiency, all at the same time.
There are three
sizes of clamps:
If you have any questions about the sizes on your bike,
you can use our printed out Tubing
If you have a Rans Bike due to the variety of configurations we strongly advise measuring first before ordering
Sold in pairs as a left and right set. 16 grams.
A 3mm Allen wrench is required to operate the clamp bolts.
Operation and use of the clamps is very simple:
1. Slip the larger end of the clamp over the large tube and lock it on.
2. Slip the smaller tube into the larger tube, then lock it in.
It is recommended that you ensure that at the smaller tube is inserted at least 2 diameters into the larger tube. This is comparable to or possibly smaller than the minimum insertion requirement on the grenade pins.
To remove and replace the seat easily:
1. Loosen the bolt on the larger tube 1 full turn.
2. Slide the smaller tube out of the larger tube, with the clamp still in place on the smaller tube.
3. When you want to reassemble things, simply slide the smaller tube into the larger tube until the clamp is seated around the larger tube again. Retighten the clamp to the larger tube. Everything is back to where it was.
These clamps are compatible with any bike that uses telescoping tubes that are either 1/2 to 5/8 inch, 5/8 to 3/4 inch, or 3/4 to 7/8 inch.
Bikes/Trikes with 1/2 into 5/8 Tubes: Bacchetta, Burley, Sun, Longbikes, some older Rans models
Bikes/Trikes with 5/8 into 3/4 Tubes: Newer Rans models, WizWheelz/TerraTrike pre 2012 models, and Barcrofts
Bikes/Trikes with 3/4 into 7/8 Tubes: 2012 and newer TerraTrikes and other larger rear strut machines
It does not matter whether the larger or smaller tube is on the top or the bottom. The clamps work either way.