It's Soma so they are welded in Taiwan using Tange Infinity tubing. For the price it is a really nice frame and many years later really zero complaints at least none I can really make that is fair. It is excellent quality and a fun bike that a lot of people enjoy riding it is the one bike I have loaned out to others and people have all liked it. Granted it is a combination of things but the frame is comfortable and paired with the ridiculous stack it is a super upright bike. I have a ton of spacers on top of a really long headtube so it is really nice and upright.