i like your trailer design and i have two suggestions

1- used hydraulic hose is wire meshed and is a common wear item on lots of machinery. i personally have never seen pipe bender as strong, cheap or common as hydraulic hose

2- use the down tube - head tube section of the frame with the ht over the steer tube it can be rotated and bolted or simply the headset tightened to achive the needed angle for the hitch and the downtube canbe drilled a few inches from the other end then a looped and clampedcable end can be inserted with a bolt through the dt and the loop, then the hydraulic hose pushed over the cable and into the dt the bike end of the hitch can be the same as you describe but the flattened end can be bent to match the angle of the dt so as to keep the hitch out of the wheel when turning to the right the bike end of the hitch can also be a piece of the dt so the sizing and fit of the hose is uniform and eliminating
the need for handlebar or stem

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actually i haven't gotten around to trying it yet but i think you can simply drill through the tube and the hyd. hose forgetting the cable hyd hose especially in the 3/4 id range is pretty tough stuff and i'm pretty sure it would withstand all the stress a bicycle could
put on it.

Christi Lynne http://www.acmebicyclecompany.com

I live on a boat and have no road access to my home, only a narrow pathway. This trailer has been vital in allowing me to transport heavy items and shopping to the boat. I have loaded it up with powertools, a generator, children and even a kayak. An impressively strong design.

Henry Godfrey

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