(courtesy of equusbicycle.com )
Columbus steel has many names and grades when used for bicycles,
rather than plagiarize other people’s hard work, here’s a few good links.
http://italiancyclingjournal.blogspot.com/2007/11/columbus-steel-tubing-for-frame.html
Gilco Design
http://www.gilcodesign.com/doc/GILCOdesignBICI.htm
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