Renewed one wheel trailer

Bend of steel pipe with an aluminium piece

of pipe inside between the red lines

Used materials:

Aluminium frame  22x2 mm  30x4 mm  25x1,5 mm

18x2 mm inside pipe

Steel bend 22x1,5 mm

Steel 18x1,2 mm  inside pipe  red line at the draw

Standard rond 12 mm

Afterwards, welding the hinge is not such a good idea because of the warping of the aluminum, it is better to make the hinge from nylon as shown below