Dalbello Hrypton 120's crumpled like tin can

CoaxArcMan I tried on some Krypton 120's warm in the store and flexing them, they just crumpled in half. The lower shell bulged out out when I flexed the boots without even trying - there was no wall, no "progressive" anything. What gives?

Dunno bout the krypton's but I tried on some Il Moro MX 110s to see how they compared to my descendant 6's. The Dalbello's felt A. Softer than what is supposed to be a 90 from full tilt and B. The squeakiest noisiest flexing boot I have ever heard.

CoaxArcMan I tried on some Krypton 120's warm in the store and flexing them, they just crumpled in half. The lower shell bulged out out when I flexed the boots without even trying - there was no wall, no "progressive" anything. What gives?

In addition to being room temperature (keep in mind that normal PU boots will stiffen significantly when frozen), tongued boots generally do not offer a progressive flex that ramps up towards the end of the flex pattern- they offer a more linear flex with a minimal amount of ramp up. That tongue boots are "progressive" is generally inaccurate. If you're looking for a progressive flex pattern to the boot, you should probably be looking at overlap constructions not tongue constructions.

progressive flex is the worst name for 3 piece boots. They are the exact opposite (and that's why certain skiers love the feel).

The three-piece shell (left) has a base piece, a spine and a ribbed tongue—like the bendy portion of a straw— which provides a progressive flex. This means that the more you flex the boot, the stiffer it gets.

CoaxArcThe three-piece shell (left) has a base piece, a spine and a ribbed tongue—like the bendy portion of a straw— which provides a progressive flex. This means that the more you flex the boot, the stiffer it gets.

Please enlighten Nerdy with your vast ski boot knowledge.

mystery3Please enlighten Nerdy with your vast ski boot knowledge.

I know shit. That's *why* I posted. But I thought the 3 piece boots were "progressive" in that they increased in stiffness until hitting a wall, as opposed to traditional boots that have more even, consistent stiffness/flex. At least that's what I thought I read. Then I tried on a 3-piece and there was no wall, it just flexed really easily, even buckled out, and there was no wall.

That post I did above is pasted from somewhere sort of explaining the 3 piece flex pattern.

**This post was edited on Sep 11th 2018 at 11:36:41pm

CoaxArcI know shit. That's *why* I posted. But I thought the 3 piece boots were "progressive" in that they increased in stiffness until hitting a wall, as opposed to traditional boots that have more even, consistent stiffness/flex. At least that's what I thought I read. Then I tried on a 3-piece and there was no wall, it just flexed really easily, even buckled out, and there was no wall.

That post I did above is pasted from somewhere sort of explaining the 3 piece flex pattern.

**This post was edited on Sep 11th 2018 at 11:36:41pm

I'm just giving you a hard time. Listen to the podcast interview linked in this thread:
https://www.newschoolers.com/forum/thread/858326/I-talked-to-Blister-Gear-Review--they-recorded-it---
To get an idea of what Matt (onenerdykid) is all about.

CoaxArcI know shit. That's *why* I posted. But I thought the 3 piece boots were "progressive" in that they increased in stiffness until hitting a wall, as opposed to traditional boots that have more even, consistent stiffness/flex. At least that's what I thought I read. Then I tried on a 3-piece and there was no wall, it just flexed really easily, even buckled out, and there was no wall.

That post I did above is pasted from somewhere sort of explaining the 3 piece flex pattern.

**This post was edited on Sep 11th 2018 at 11:36:41pm

If you define "progressive" as something that becomes stiffer the deeper it gets into its travel, then yes at the most strict reading of that definition a 3-piece boot is progressive. All ski boots will do this to some extent. The difference is that some boots really do it, and some boots barely do it. That doesn't make any claims to which is better, just we have to be clear on the difference between different constructions and how they work.

So, of course, a 3-piece boot feels like gets stiffer toward the end of its flex pattern, but our robot flex testing (and basically anyone who flexes the boots too) shows a flex pattern that does not significantly ramp up toward the end. You hear people comment that the flex of these boots is unending. The unending part is good descriptor- because it's more linear, it feels like keeps going how it started. The OP describes something similar in his post.

When developing an overlap boot, we want to have a supple beginning, a supportive middle, and a firmer end. If any of you are mountain bike savvy, you'll often hear this language used to describe the damping curve on a full suspension bike. The trick is to not make it too stiff at the beginning, middle, or especially at the end. It is smooth, but getting progressively stiffer the more you flex it.

Is a more linear flex pattern or a more progressive flex pattern better? I'll leave that up to you guys to debate.

onenerdykidIf you define "progressive" as something that becomes stiffer the deeper it gets into its travel, then yes at the most strict reading of that definition a 3-piece boot is progressive. All ski boots will do this to some extent. The difference is that some boots really do it, and some boots barely do it. That doesn't make any claims to which is better, just we have to be clear on the difference between different constructions and how they work.

So, of course, a 3-piece boot feels like gets stiffer toward the end of its flex pattern, but our robot flex testing (and basically anyone who flexes the boots too) shows a flex pattern that does not significantly ramp up toward the end. You hear people comment that the flex of these boots is unending. The unending part is good descriptor- because it's more linear, it feels like keeps going how it started. The OP describes something similar in his post.

When developing an overlap boot, we want to have a supple beginning, a supportive middle, and a firmer end. If any of you are mountain bike savvy, you'll often hear this language used to describe the damping curve on a full suspension bike. The trick is to not make it too stiff at the beginning, middle, or especially at the end. It is smooth, but getting progressively stiffer the more you flex it.

Is a more linear flex pattern or a more progressive flex pattern better? I'll leave that up to you guys to debate.

Just give me Kashima ski boots and I'll be happy.

cydwhitJust give me Kashima ski boots and I'll be happy.

Working on it ;)