Originally Posted by Atomicman
The Booster Strap was designed by the inventor to be placed over the tongue & behind the shell if the shell goes up that high.
You lose almost all advantage of the elasticity and rebound of the Booster strap by placing it outside the shell. The only advantage over a Stock strap that the Booster has when placed outside the shell, is the ability to pull it much tighter than a stock strap due to the ratchet cam closure mechanism.
I ONLY ski with mine between the tongue and the shell and I believe it provides more flex and more progressive flex and rebound than a Booster outside or a stock strap inside or outside.
I have been using them for many, many years, as far back as I can remember.
Originally Posted by Noodler
Exactly. Just because you can see the Booster strap doesn't necessarily mean that it's sitting over the top of the shell. Head Raptors have a line embossed on the shell to show you where to trim down the front of the cuff for "tuning" purposes. This is only about a 1/4" of plastic and once removed the Booster rides directly on top of the liner tongue.
Ghost - put a Booster on those old Koflachs. I promise you that you'll experience a huge boost in boot performance by having the Booster provide a direct connection to the spine of your boot. Although if the plastic is old enough it may also result in the spine cracking!
A few years back Bode talked about the booster strap application in some article which caught my eye…and I have no inclination to find it now. Suffice it to say while he is dead set against cutting away PU (stiffness) he does call for top of shell “perch” for the booster to best contact the tongue.
Simply, and per design, the booster strap is minimizing the transmission gap that occurs from shin to tongue to shell. That is, a greater gap (including our leg soft tissue and boot tongue material) that exists between shin and PU shell is simply a loss of command and control.
World Cup athletes and their mechanics rely primarily on PU, not elastic bands, to stiffen. What you do not see is use of additional integrated/bolted shin plates if needed per athlete. In fact, adding the booster IS more endorsement than performance for these pros IF used outside of shell. Certainly it’s not hurting anything outside the shell and will add to stiffening the boot in as a entire unit while not fully maximizing performance as intended.
All that said, you can wear the booster strap as a necklace for all I care. Might even look pretty Euro cool (who here will be the first?)
But make no mistake, anything less than full on contact with the boot tongue lessens the “performance” measure of this product.