Originally Posted by
frantik
The Ironman bikes were made with Tange #1, which was renamed from Tange Champion. Unless Tange Infinity has changed, Champion was above infinity and below prestige.
"Champion" was Tange's brand name for their seamless Chrome-Moly tube sets. The numbers designated differences in wall thickness, not quality. Thus a Champion #1" tube set was lighter than a "Champion #2" set, but of the same quality. "Prestige" tubing was heat-treated Champion tubing.