Some lightweight steel tubing goes as thin as 0.4mm, so you can easily damage a decent frame. You can get a framebuilder to remove them. They just heat them up til the braze softens.
@Tris started
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Some lightweight steel tubing goes as thin as 0.4mm, so you can easily damage a decent frame. You can get a framebuilder to remove them. They just heat them up til the braze softens.