Originally Posted by Cgrandy
In using the Booster Strap to achieve the snug fit between shell liner and calf, are you executing a work around for a boot shell that starts out with a "too High" flex rating? One would think the boot companies would want to know about that.
I interpret the "on/off" comment as "this boot is WAY TOO STIFF" when left to it's basics.
Hey! Don't get me wrong, I skied my Scarpa Denali TT's (With a Booster) today on firm to icy surfaces, I really like a soft boot!
I also ski the Head WC and Dalebello Lupo in 130, with tight to shin cuffs.
I'm not knocking anything, just trying to grasp the "WHY". ;-))
You're repeating yourself from earlier posts. Let me try to make my experience more clear. I have large, muscular calves. None of the boot buckles (exc on the Zzeus) are at the top of the boot & liner; they are lower, on a smaller parts of my calves. To get the boot tight at the top using the buckle, excess pressue is put on the lower calf. So boot mfrs add a pretty worthless "power strap" that people can try to use to snug up the top of the boot and liner. Most of the ones I've had don't function that well at all. A booster strap with its cam lock allow snugging up the upper boot and liner without putting excess pressure on the lower leg. The rubber part allow the strap to flex as one flexes the ankle and, of course the calf muscles. By snugging up the rear of the shell to the rear of the liner, one can then buckle the upper most buckle to get a snug fit to the lower calf w/o excess pressure.
On my Zzeus, with the unflexible power strap I was deforming the lower shell; with the booster strap I could more finely judge the shin pressure and realize when I reached the effective limit of the cuff. Since you are familiar with AT boots, I don't see how you think that a TLT5, TLT6, or Zzeus hafve a "too high" flex rating and since I often don't use a strap with my Mercuries (TGR flex rating of 120) unless the snow is difficult, I'm not using the strap because the flex rating is too high.
As I said, YMMV; people differ anatomically and in mass (I weigh 225 lbs) and in preference for boot stiffness. as someone who telemark skied for 25 years, I generally preferred soft boots except on bigger skis. But, yes, I found the Panterra too stiff with a power strap but not without--so it was the power strap not the flex. But with the Booster strap I just get a better (more snug) fit to the upper calf that allow more feel for what the boot is doing, a more progressive feel, all without having to over tighten the buckle on the boot.
BTW, the proper use and benefits of the Booster Strap are detailed on their web site and my experience agrees with their claims; yours may not.