i just bought a new mountain bike frame.
near the top tube/head tube junction is a vertical bulge about 1 cm long in the top tube. i think its from heating when the tubes were welded.
there's no defect inside the tube (you can't feel it), just a bulge on the outside.
the manufacturer says it's no risk, but they're willing to exchange it. i don't really want to wait for a replacement, but i will. any opinions on whether 6069 aluminum is weakened by heating? i think some metals need controlled heating/cooling to be strong, but not sure about this aluminum.
thanks
near the top tube/head tube junction is a vertical bulge about 1 cm long in the top tube. i think its from heating when the tubes were welded.
there's no defect inside the tube (you can't feel it), just a bulge on the outside.
the manufacturer says it's no risk, but they're willing to exchange it. i don't really want to wait for a replacement, but i will. any opinions on whether 6069 aluminum is weakened by heating? i think some metals need controlled heating/cooling to be strong, but not sure about this aluminum.
thanks