QuoteIf you can find a farmer in the middle of the Himalayas to weld your thin gauge steel tubing without burning it up, you'll also be able to find someone to weld your aluminum frame.Don't count on being able to get any of the materials repaired on the road. One of our neighbors is a welder with decades of experience and all kinds of certifications and he works on aircraft stuff every day. When I asked him about this kind of thing and told him how thin the bike tubing was, he said he wouldn't touch it. We have another friend who is an experienced welder who also teaches welding, so I asked him. Same thing. He wouldn't touch it.
Which is why I always say aluminum or steel frame, makes no difference. Repairability on the road in the middle of nowhere is the same. Not really repairable at all. Best option is to have $100 and take a truck, bus, plane, train to the closest big city with a real bike frame maker or machinist shop and have them fix it. A good machinist shop should have the equipment and person able to weld/braze thin gauge bicycle tubing. Or a good machinist shop would know who the local person is that does this kind of work and they farm their jobs out to.