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Dlonetti
August, 2024

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How much difference in boot length BSL and bindings is fine

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Dlonetti
Posts: 1627 - Karma: 16,114
Bought new boots and had the shop adjust my skis to fit the new ones. The wouldnt adjust one pair because it was missing a piece and tbh they are old af. The bindings were originally adjusted for 326 BSL and the new boots are 325 BSL. Is it fine to ride? Theyre my urban skis anyway. Also separate question, what happens if you ride grip walk boots on non grip walk bindings? Is that a big no no?
Nov 15 2023 4:05PM
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officechair
Posts: 209 - Karma: 1,587
I’ve switched between 1mm BSL difference without issues, but I’m not sure how big of a deal it actually is. It does change the forward pressure though when I checked on my attacks.

I don’t think a gripwalk boot will fit a binding that isn’t compatible? Friend once tried to clip into some bindings not set up for gripwalk and couldn’t clip in.

**This post was edited on Nov 15th 2023 at 5:10:33pm

**This post was edited on Nov 15th 2023 at 5:11:55pm
Nov 15 2023 5:09PM
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burrata
Posts: 103 - Karma: 779
gripwalk boot in a non-gripwalk binding will greatly affect the way your afd releases your toe, even if the forward pressure is correct it most likely wont release close to where it should (in the accepted torque range). depending on where ur din is at, lower it a little for sure if you wanna keep riding them

to follow up with previous reply, i dont see much of a difference being present in a single mm of sole length. just learn how to check your forward pressure and dial that shit in

**This post was edited on Nov 15th 2023 at 5:26:36pm
Nov 15 2023 5:25PM
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Dlonetti
Posts: 1627 - Karma: 16,114
Good advice, thanks all. Won’t ride the non grip walk bindings, gonna try and find a different pair for those skis. Looks like I’ll have to figure out how to adjust forward pressure on griffons
Nov 15 2023 5:38PM
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onenerdykid
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Re: BSL - Just because a boot says "325mm" doesn't mean it's actually 325mm. There is nothing in the Alpine Norm ISO 5355 about the actual sole length of the boot corresponding to the stated measurement. The only thing in the norm is that a pair of boots cannot deviate by more than 1mm from each other. So a sole can say "325mm" but actually measure "329mm" and be legit.

So, just because one boot says "326mm" and another says "325mm", it is not necessarily the case that the boots are only 1mm different. Could be that, could be way more.
Nov 15 2023 5:47PM
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Dlonetti
Posts: 1627 - Karma: 16,114
onenerdykidRe: BSL - Just because a boot says "325mm" doesn't mean it's actually 325mm. There is nothing in the Alpine Norm ISO 5355 about the actual sole length of the boot corresponding to the stated measurement. The only thing in the norm is that a pair of boots cannot deviate by more than 1mm from each other. So a sole can say "325mm" but actually measure "329mm" and be legit.

So, just because one boot says "326mm" and another says "325mm", it is not necessarily the case that the boots are only 1mm different. Could be that, could be way more.

Hmm good to know. I was just going off info from evo
Nov 15 2023 6:04PM
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onenerdykid
Posts: 6652 - Karma: 10,774
DlonettiHmm good to know. I was just going off info from evo


You'll always need to put the boot in the binding and check forward pressure. That's the only way to know.
Nov 15 2023 6:08PM
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Dlonetti
Posts: 1627 - Karma: 16,114
onenerdykidYou'll always need to put the boot in the binding and check forward pressure. That's the only way to know.

Good time to learn I guess
Nov 15 2023 6:52PM
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Chunderface
Posts: 2482 - Karma: 9,628
Man last year I went from a 330bsl to a 320 bsl, and forgot to adjust the forward pressure on one of my sets of skis with pivot 18's. Skied a whole day on them before I noticed and they never released.
Nov 15 2023 10:11PM
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Dlonetti
Posts: 1627 - Karma: 16,114
Okay update. Bindings on the nomads are grip walk, they just don’t have AFDs on either of them. How sketchy to ski without them? I did it all last season
Nov 16 2023 6:49PM
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animator
Posts: 4547 - Karma: 26,214
onenerdykidRe: BSL - Just because a boot says "325mm" doesn't mean it's actually 325mm. There is nothing in the Alpine Norm ISO 5355 about the actual sole length of the boot corresponding to the stated measurement. The only thing in the norm is that a pair of boots cannot deviate by more than 1mm from each other. So a sole can say "325mm" but actually measure "329mm" and be legit.

So, just because one boot says "326mm" and another says "325mm", it is not necessarily the case that the boots are only 1mm different. Could be that, could be way more.


Church!
Nov 16 2023 9:24PM
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