A simple clamp for holding a flag on a bike trailer, designed in CAD and printed on a 3D printer.
Step 1: The Problem
I like pulling the kids in a bike trailer, but the old trailer I bought didn't come with a flag. I'm sure you are an excellent driver, but have you seen how the rest of them drive? So I went to the local bike shop and bought the trailer flag they had.
The flag pole seated in a metal bracket, which seated on the axle between the hub and the frame of the trailer. The metal bracket lasted about two months before it got squished and bent and loose.