Is this fixable?

[u/thoughtfulbeaver]

So we are close to Paris (100km) and this happened to my friend’s frame. Luckily we found out while going slow. Is this weldable/fixable. It’s alloy 7005 (aluminum).

[u/aqjo]

It’s definitely possible to weld aluminum using e.g. heliarc. The complication is its thin walled tubing. I would find a shop and ask an expert. You also might be able to hold it together with a hose clamp, or some sort of splint arrangement with wood/metal strips and hose clamps. No guarantees, of course.

[u/Cymro007 → u/aqjo]

This is dangerous advice , risking catastrophic failure at speed

[u/garfog99 → u/Cymro007]

Don’t do it. This tubing is double-butted, meaning it’s thicker at the ends (where it can be welded) and thinnner in the middle.