Revamping a bike trailer?

[Nvreloader]

Hey Guys
Since, I can't find what I want in the single wheel form of bike trailers, I am left with this option....

This is what I want to do,
Add a second wheel to this single wheel type of bike trailer, to better increase it's handling when using on single track trails, hauling stuff in and out.

This type of single track off road bike trailer, generally ONLY comes with a single rear wheel,
see info here, of these types of bike trailers.

Google Search

I'll have a second wheel (copy of the OEM wheel), and I'll have to remove the OEM wheel frame, all parts from the trailer body, then figure out the needed spacing between these 2 wheel cages, then reweld both to the proper spots, and both rear wheels will have coil suspension.
And I think I should have a rear brakes, on the rear trailer wheel, and need to figure out how to do that on one or both of the trailer wheels. I am getting too old, to be packing out game quarters on my back, anymore.

I will be using my Miller 211 wire feed welder, using flux core .030 welding wire.
It's been a while, since I have welded anything with this .062>.080" thickness tubing, and I'll need to brush up on welding this type of tubing, I know.

If you are a welder and have welded this type of thin walled tubing,
any thoughts or suggestions would be greatly appreciated.
yrmv

 

[Biplaneguy]

MIG welding thinwall tubing can be done, but it's tricky. There's a fine line between adequate penetration and burning through, which is why TIG or gas welding is preferred. With MIG or TIG, you will need to stress relieve it with a torch afterward or you'll be asking for cracks.

In the aircraft world where thinwall chromoly structures are common, gas welding is still the standard. I believe one manufacturer uses MIG, but they had a huge learning curve and a lot of problems until they got it dialed in.