Por si alguno tiene dudas, he buscado algunos enlaces.
[
www.skiboots.com]
"Flex Index- The flex index refers to the forward flexing stiffness of the boot. There are 2 very important things to know about the flex index.
1) There is not an industry standard. Therefore a Salomon 120 flex is not the same as a Lange 120. 2) The flex of the boot has as much to do with the stiffness of the plastic as the way the boot in constructed. A 98mm last boot in a 100 flex will be stiffer than a 120flex in a 102mm lasted boot since the 98mm last is designed more towards performance. Generally as the boots get wider they will also be softer flexing than a narrower boot. This is true even if the
the manufacturer gives both boots the same flex index."
[
www.livestrong.com]
"Consideration
Flex index is not based on any scientific standard. It is not standardized across manufacturers and it indicates flexibility within only that brand of boots. Mechanical engineer Dwyer C. Haney notes on Spadout.com that the fact that the flex index numbers have no units of measurement associated with them is a tip-off that they might not be based on any actual measurement. REI advises that the only way to compare the flexibility of boots from different manufacturers is to actually wear the boots and try moving around."
Saludos.
