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Sole Length Numbers on Bindings

post #1 of 6
Thread Starter 

My daughter just got a pair of Nordica Olympia Victory skis with integrated Marker  bindings. The shop set up the bindings. Her boot sole length is 282, the toe is set at 284 (there's no 282) and the heel something like 306. The centerline of the ski and boot match up, so I would presume they are set up correctly.


Given that neither setting really matches her boot's sole length, what's the meaning of these numbers?

post #2 of 6

Look at the ranges on each of those toe and heel reference points. smaller range on toe keeps the boot centerline closer to the mark on the ski. 


Think of it this way, toe marked every  25 mm would be 250, 275 and 300.  


If toe piece was set at say 275 in this case and the sole length is 282, there is a 7mm difference which I think would put the line 3.5mm (assume 1/2 the difference) behind of the line.  The heel just is where it needs to be to allow for forward pressure to be adjusted properly.


If set at 300, the toe would be 18 mm off so the toe would be 9mm ahead of the line.


If the toe range was cut to say 4 mm between setting points you'll keep the boot line closer to the line on the ski. 


Again the heel is sort of an afterthought.  The range is a good place to start, but not cast in stone --although I'd have guessed it would be marked closer to the toe measure.

post #3 of 6

The boot must snap into the ski binding and slightly push the heel piece backwards against its springs.  This pre-load is essential in most models of bindings (all models?).  The correct binding length setting is critical.  Every binding I've seen has an indicator to indicate that this pre-load is correct.


Do not trust the doofuses that worked in that shop.  Get this setting checked.  Be sure that the bindings were tested for proper release with the Vermont Release Calibrator.

post #4 of 6

I didn't mean to suggest otherwise,


OP asked what the references meant, if not sole length. 


My comment was simply that the more important for setting boot sole length, in my opinion, was the toe piece because it has a much more direct impact on boot centering.  The heel, however marked, is simply adjusted to make the 'pre-load' (forward pressure) correct for the particulat boot being fitted.


While you would expect the marking to reflect similar sole length ranges -- as long as the thing is set properly I would not get too excited about a seeming mismatch in references!




post #5 of 6

The toe is the key measurement, because that determines the position of the boot.  The position of the heel simply determines forward pressure.  Sometimes, the numbers are off by a little bit, and so that might explain it.  Plus, there is a range of forward pressure that is acceptable, and so the position of the heel can vary a bit, while still being "correct."


The best way to make sure everything is OK would be to check the forward pressure yourself.  There should be a small screw in the back, and that screw should be flush with the housing of the binding.  Check out this thread: http://www.epicski.com/forum/thread/78875/is-this-how-you-set-forward-pressure-with-marker-m12-bindings

post #6 of 6

I have the same type of bindings, Markers M10, and similarly, the toe is set at the boot length (314), and the midpoint of the boot is at the midpoint of the ski, but the heel is set at marking 328.  If the heel is moved to 314 the boot would not fit in the binding.


There is also no adjusting screw at the back for forward pressure, but there is a piston ( where the screw is in the photo on the link above) with a white triangle marking that I think indicates forward pressure by how much it is sunk into the binding.

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