What would be the RS-equivalents* in flex to the Lange ZA (listed as 130) and ZB (listed as 140)? I've gotten two different answers, both from sources that should be very familiar with both boot lines.
One says that the flex numbers for the RS series are equivalent to those of the Z series, and that the ZA is thus equivalent in stiffness to the RS 130, while the ZB is equivalent to the RS 140.
Another says that the ZA is softer than the RS 140 (but didn't say how much softer), while the ZB is stiffer.
*I use "equivalent" because differences in flex curve, geometry, and possibly also rebound, make an exactly match unlikely.
Edited by chemist - 12/29/15 at 5:27pm