Originally Posted by
saddlesores
handlebar bar hanger supports are typically made of steel rod.
i used the oldfangled style bar bags that used a steel rod support, with bungee cords down to hooks at the dropouts, for years. carried 5-8 pounds, including SLR camera with 200mm lens, with no issues.
switch material should solve your problem.
I'm almost certain that my super old handlebar bag used aluminium for its support doohickey --but just thicker than this. I lost part of it ages ago so haven't used it in donkeys years, but had no problems with it back in the day.