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binding adjustment--how many mm's before noticeable

post #1 of 9
Thread Starter 

How many mm's can a binding be shifted forward or backward before an average expert might be able to tell a discernible impact. I am primarily asking in regard to new boots that require an adjustment--so say for example the binding needed to be shifted 2mm's back on its rails to accommodate a new boot? does it differ forward or back? Is there a difference between conceptually and realistically--so conceptually any change can be felt--but realistically, unless you are a world class skier, you won't feel anything less than 3mm's?  Thanks for opinions. David

post #2 of 9

I don't know the answer, but do keep in mind that if you move the toe 2mm, for example, you move the boot center half that distance, or 1mm. Which is probably less than the difference between your right ski and your left.;)   And at the distance where the difference would be noticeable, I wonder if it would be the world class skier or the intermediate would notice it more. Of course the world class skier would understand the difference and be able to compensate while the intermediate would just think it's a lousy pair of skis. 

post #3 of 9

5 mm before most could pass the "blindfold test".

 

Stenmark excluded, of course!

post #4 of 9
Quote:
Originally Posted by blitz View Post
 

How many mm's can a binding be shifted forward or backward before an average expert might be able to tell a discernible impact. I am primarily asking in regard to new boots that require an adjustment--so say for example the binding needed to be shifted 2mm's back on its rails to accommodate a new boot? does it differ forward or back? Is there a difference between conceptually and realistically--so conceptually any change can be felt--but realistically, unless you are a world class skier, you won't feel anything less than 3mm's?  Thanks for opinions. David

It depends on what kind of bindings, where the forward pressure indicator was with the previous boots, and where it is with your new boots.  If the forward pressure indicator is outside of the acceptable range area with your new boots anyone would notice because they will either eject out of the skis when trying to turn or do serious damage to their body when the skis don't come off during a fall.

 

Take them to a certified tech at a shop or at least research how to check the forward pressure on whatever binding you are asking about.

post #5 of 9

I prefer adjustable bindings. I make moves in 1cm (10mm) increments for initial evaluations. It might take 3 or 4cm to get a feel I like (or hate). Fine tuning stops when I'm moving 5mm.

 

I don't notice if I change boots and there's at least 10mm difference between boots I frequently alternate. Note that I will adjust the bindings to fit the different boots but not change the toe position on the ski.

 

Crgildart, obviously I set up the bindings properly so release properties are consistent. There's still some tolerance there - probably a couple mm. I have been known to switch on the hill with a buddy. Usually the skis stay on if the boots are within 10mm either way - I realize this is avoidable risk (but sometimes I'm too lazy to be safe for just a couple turns. "Danger is my middle name!")

 

I like quick turns and don't like to ski fast enough to need lots of stability so I normally start testing about 10mm forward of factory settings. I do enjoy testing skis so the evaluations are a fun part of the skiing experience. But maybe my tolerances for misplaced bindings are wider than others. Schizios rock!

 

Eric

post #6 of 9
I just went down a a whole boot shell and just adjusted the heel forward. I can't tell any difference.
post #7 of 9
Quote:
Originally Posted by HRPufnStf View Post
 

5 mm before most could pass the "blindfold test".

 

Stenmark excluded, of course!


5 mm sounds about right to me.

post #8 of 9

5mm which is the distance between slots on my Vist Speedlock plates can make a noticeable difference.

post #9 of 9

Remember that to move the boot center 5mm--let's stipulate that as the smallest difference some skiers could detect-- there would have to be a 10mm difference in BSL. In the OP's question he's not talking about remounting the whole binding, just moving either the heel or toe. And for most non demo bindings, if they were initially mounted in the center of their range, a 10mm difference in BSL or maybe a hair more is the most the binding will accommodate. So bottom line--if your new boot will fit the binding with correct forward pressure--the difference in performance will be either minimal or none.

 

Now if you deliberately mount a binding at the end of its range to allow people with different BSL's to swap skis you might be able to accommodate a 20mm+  difference, or a 1 cm boot center difference, which a lot of people would notice. 

 

For the OP--if the difference is large enough to notice--forward=easier to initiate turn. Back=better float and better tail bite at the end of a turn. 

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