Re:
Yes, I've read that's the procedure.
But when we look at the specs (http://www.equusbicycle.com/bike/tange/ ... at1997.pdf)of Infinity MTB Cr-Mo Tapered Double Butted Tubes for example, we find:
Seat tube: 28.6 S.B.T. (1.0-0.7)
The seat tube has single butted tubing, 1.0mm thick at the...