Tange Infinity was just seamed chrome moly tubing that has been drawn on a mandrel to make the seam go away. Not nearly the same as Prestige which is drawn from a solid billet of steel like all top tubings and then heat treated. Prestige is the closest thing to 753 Tange made and is a beautiful tubing that came out of the box with a flawless almost mirror finish, much nicer than Columbus or Reynolds. It had a yield strength of 175,000 psi as I recall. We (Davidson) made thousands of bikes out of it over the years. Infinity was used on some basic production bikes.
Bob Freeman
Seattle