Originally Posted by RBC
So the question is when do I need to flex the boot ? how do I know if this boot has adequate flex ?
Thanks for the help
The boot flex regulates the rate at which you can apply pressure to the ski. It is primarily thought of as applying or removing pressure to the front of the ski but can effect lateral inputs as well. Stiffer boots transfer the pressure quicker than soft boots. You need to be aware that a stiff boot also requires more finesse than a softer boot and a higher level of skiing. Stiffer does not equeal better. You need to flex the boot whenever you want to control the ski.
Temperature greatly affects the stiffness of the materials boots are made from (ie. colder = stiffer). So what works in the shop can be way to stiff on the mountain.
You should be able to flex the boot enough to get your knee over the toe. You should check the stiffness by flexing both ankles at the same time. Flexing both together is harder than individually because your weight is split in half.
All this of course presumes that your boots fit correctly. Incorrectly fitting boots will make this harder, as will poor alignment.