Thinner 75mm boot soles?

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bgregoire
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Thinner 75mm boot soles?

Post by bgregoire » Mon Feb 18, 2019 6:28 pm

I am hearing reports some of the new 2018-2019 boots, specifically the Alpina Alaska, are popping up with thinner Vibram duckbills. 15mm instead of 18mm. Can anyone here confirm? Is this also the case for other brands and models this year?
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Re: Thinner 75mm boot soles?

Post by jalp » Tue Feb 19, 2019 1:51 am

bgregoire wrote:I am hearing reports some of the new 2018-2019 boots, specifically the Alpina Alaska, are popping up with thinner Vibram duckbills. 15mm instead of 18mm. Can anyone here confirm? Is this also the case for other brands and models this year?
I think the Alaska 75's have been at 15mm for at least a few years now. I just put the calipers on mine and they are 15mm. The boots were made in 5/2016 according to the tag.

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Re: Thinner 75mm boot soles?

Post by lilcliffy » Tue Feb 19, 2019 10:47 am

I can confirm that the first-generation Alaska 75 had a 15mm duckbill.
I cannot speak for the current model Alaska 75- though I did examine it briefly and it definitely had a stiffer sole-flex than the first-gen, with its super floppy sole.
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Re: Thinner 75mm boot soles?

Post by phoenix » Tue Feb 19, 2019 1:57 pm

My Alaska's are maybe 2 years old, I'll measure them when I'm home later... but I know they're thinner than an Excursion or T3, T4, etc sole.

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Re: Thinner 75mm boot soles?

Post by bgregoire » Tue Feb 19, 2019 6:08 pm

Well I was not aware the Alaska duckbills have been thin (15mm) since their beginning. Anyone with other brand/model boots purchased in the last couple years care to give me their duckbill widths?

I'm curious if all boots of a given year have the same vibram sole or if that can vary from model to model...
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Re: Thinner 75mm boot soles?

Post by phoenix » Tue Feb 19, 2019 6:43 pm

Just measured mine: 16.07mm duckbill, Vibram sole. My excursions are a little over 18mm.

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Re: Thinner 75mm boot soles?

Post by Tom M » Wed Feb 20, 2019 10:40 am

The duckbill on my Fischer BCX 675's (2017 Version) is 17 mm.
The duckbill on my Rossignol BC X-12's (just purchased) is 17.5 mm

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Re: Thinner 75mm boot soles?

Post by bgregoire » Thu Feb 21, 2019 7:40 pm

Thanks for your answers! I've come to the following conclusions about these thermomolded vibram soles

1) I was surely wrong about the shrinkening thickness of the Alpina Alaska duckbill, seems they were actually thin on along.

https://www.telemarktalk.com/viewtopic.php?f=1&t=218

2)To my great surprise, it appears Vibram offers different duckbill thicknesses and perhaps other variables as well to the different boot manufacturers in a given year!?!

Apparently, the new Voile Mountaineer and Voile 3-pin cables are designed to take a minimum of 16mm (up to 20) whereas the Rottefella Super Tele can go down to 13mm.

So, the ST should be a better binding for the Alaska....

I've just been thinking, why doesnt Alpina use a thicker duckbill sole?
I live for the Telemark arc....The feeeeeeel.....I ski miles to get to a place where there is guaranteed snow to do the deal....TM

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Re: Thinner 75mm boot soles?

Post by Leo Tasker » Fri Feb 22, 2019 7:05 am

I wonder if a thinner sole flexes more easily, and is therefore less prone to cracking than a thicker, stiffer one? Might be one reason for boot makers to switch, even if it makes the boot less powerful for downhill skiing...

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