Anyone here familiar with snow ski equipment?

As posted to rec.skiing.alpine.moderated:


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My wife and I are new to snow skiing and have purchased
used ski boots.

She bought a pair of used Rossignol R900's. They have what appears
to be 2 adjustments and I would like to learn what these adjustments
do.


1. A black "knob" on the back set to "1" with
a movable tab that reads "lock".

2. A metal screw head on the ankle that uses an allen
hex wrench to move the screw head in 1 of 3 positions.



She complains she is leaning too far forward
when wearing the boots. I feel like I can stand up
straight when I wear mine.

I tried to turn the black knob once but its very stubborn
and Im afraid to take a pair of pliers to it unless I know
what's going on.

I've been to the Rossignol website and see pictures of newer
boots with a similar black knob but info on what the hell it does
is offered.

Any help in this matter is appreciated.


Don