I like the outside joiner idea . If i got 12-10 woven at 53 gram per m joined outside by 12.7-15.5 x 50mm long weight 4.5 g plus epoxy i might get a total weight of 70 gram. 0.7mm is a bit slack for a sliding fit i would guess 0.5mm would be about right, but i think it will do. My 13-11 ish hiking pole is stronger than needed i feel. I guess the 12-10 pole will be the same weight but stiffer than the 9mm easton Al tube that is a bit too springy.

You could use a 12 OD rod from the range we have, but the tolerance would be quite slack.  The more different items you bond together, the more likely you will have a weakness or something goes wrong.  You could use a machined aluminium insert, or even a bigger tube as an outside joiner. You could even use carbon tape laminated over the join as a solution.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

Hi warren do you have a product that would work as a spigot say a 12mm od rod or tube? I suspect a pultruded rod might fail because the spigot will be in bending. Perhaps a 10-12 wrapped tube filled with a pultruded rod so it is as strong as the 12.7-15.5 main tube? Alternatively a lot of your products seem to next size down is the same od as the next up id. Is it easy to sand down cf tube to a sliding fit?

The woven tube is similar strength in comparison to the roll wrapped tubes.  The 12.7mm ID tube weighs 90g a meter so a smaller diameter tube would be fractionally lighter. There are representative figures for mechanical data for the roll wrapped tubes which you may wish to use to compare to aluminium and use to select the strength you need and hence suitable diameter.

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

Hi i want to make light strong tent pole in 2 or 3 parts socketed together. The pole needs to be 1200mm long. I know a cf walking pole I have about 13mm od about 1mm wall 3 parts with aluminium spigots 130 gram weight, is strong enough and a 9mm easton 3 part Al alloy about .5mm wall, 74 gram weight, is a bit too springy. So i thought your 12.7 wrapped id cf tube would be about right. Is your woven tube anystronger for the weight than your wrapped? I want the spigot to be a close sliding fit and not to be the point of failure. Would you think aluminium or do you make a standard wrapped tube or wrapped or pultruded rod that would work?