K2 cortex parts

email K2

@tomPietrowski

New parts will be on the website from August but I’ll send you a msg and figure sending you out a part sooner.

tomPietrowskiNew parts will be on the website from August but I’ll send you a msg and figure sending you out a part sooner.

W service.

turntableW service.

That's the kind of service that makes me wanna ride k2s. too bad I'm a masochist that prefers head raptors

deadhead420That's the kind of service that makes me wanna ride k2s. too bad I'm a masochist that prefers head raptors

Im pretty sure if you try the cortex you wont go back to the raptors.

abjectwoeIm pretty sure if you try the cortex you wont go back to the raptors.

pretty similar, heavy boots.

deadhead420That's the kind of service that makes me wanna ride k2s. too bad I'm a masochist that prefers head raptors

Thanks! Well the Raptor was a boot we used heavily in the development of Cortex as that was the boot Sam K was skiing in previously and he wanted something equal or better. Maybe slip your foot in one when you get chance.

abjectwoeIm pretty sure if you try the cortex you wont go back to the raptors.

idk about that my raptors are pretty built out. WCR 140 96mm shell with Surefoot heated liner + footbed and Vibram alpine lifter plates is top notch.

tomPietrowskiThanks! Well the Raptor was a boot we used heavily in the development of Cortex as that was the boot Sam K was skiing in previously and he wanted something equal or better. Maybe slip your foot in one when you get chance.

After taking a closer look I am genuinely curious to check out the cortex 140. I've got another year left in my current boot build but after that I'm interested.

Couple of quick questions:
-Have there been any issues with the boot fracturing on the mold line for the "Fastfit instep"? That feature looks so nice for putting on cold boots but I've seen failure quite a few times with various brands.
-Can you swap the grip walk soles to alpine and if so does the boot conform to iso 5355 for race bindings with the pin inserts?
-What is the plastic thickness of the toe box compared to race boots? I typically need toe box grinds for me to size down conformably.

The biggest turn off for me is the gripwalk soles. I've still got a couple of race skis kicking around and swapping soles multiple times in a year sounds like a pain in the ass. Especially compared the vibram lifters I use rn, that rubber is the softest and grippiest of any ski boot I've seen outside of non-compliant tour boot world. It's so damm nice for sketchy boot packs and it's ready to click into my race skis or freeride skis for mid-day ski swapping.

Thanks!

deadhead420idk about that my raptors are pretty built out. WCR 140 96mm shell with Surefoot heated liner + footbed and Vibram alpine lifter plates is top notch.

After taking a closer look I am genuinely curious to check out the cortex 140. I've got another year left in my current boot build but after that I'm interested.

Couple of quick questions:
-Have there been any issues with the boot fracturing on the mold line for the "Fastfit instep"? That feature looks so nice for putting on cold boots but I've seen failure quite a few times with various brands.
-Can you swap the grip walk soles to alpine and if so does the boot conform to iso 5355 for race bindings with the pin inserts?
-What is the plastic thickness of the toe box compared to race boots? I typically need toe box grinds for me to size down conformably.

The biggest turn off for me is the gripwalk soles. I've still got a couple of race skis kicking around and swapping soles multiple times in a year sounds like a pain in the ass. Especially compared the vibram lifters I use rn, that rubber is the softest and grippiest of any ski boot I've seen outside of non-compliant tour boot world. It's so damm nice for sketchy boot packs and it's ready to click into my race skis or freeride skis for mid-day ski swapping.

Thanks!

The only issue we had with the fast fit instep was on the bfc a couple of years back. This boots use a slightly different process however. They use what’s called over molding where the soft instep is injected separately first and then added to the last and the rest of the shell injected over this part. In cortex we instead use co-molding where the instep material is injected at the same time as the rest of the shell. We find this gives far better results.

Outsole wise yes you can put the alpine soles on the boots however the iso spec of 5355 does not allow for any inserts so they do not pass the iso spec. It is an outdated spec in my opinion which I hope they will update as through our testing the insert causes no release issues at all but it still won’t pass simply by having the insert present.

The thickness varies throughout the toe box but if you have had to do grinding on previous boots I would imagine you will be able to do similar grinding on a cortex. You may find a combo of grinding and stretching works too depending upon where you need space.

**This post was edited on Jun 3rd 2025 at 2:40:21pm

deadhead420idk about that my raptors are pretty built out. WCR 140 96mm shell with Surefoot heated liner + footbed and Vibram alpine lifter plates is top notch.

After taking a closer look I am genuinely curious to check out the cortex 140. I've got another year left in my current boot build but after that I'm interested.

Couple of quick questions:
-Have there been any issues with the boot fracturing on the mold line for the "Fastfit instep"? That feature looks so nice for putting on cold boots but I've seen failure quite a few times with various brands.
-Can you swap the grip walk soles to alpine and if so does the boot conform to iso 5355 for race bindings with the pin inserts?
-What is the plastic thickness of the toe box compared to race boots? I typically need toe box grinds for me to size down conformably.

The biggest turn off for me is the gripwalk soles. I've still got a couple of race skis kicking around and swapping soles multiple times in a year sounds like a pain in the ass. Especially compared the vibram lifters I use rn, that rubber is the softest and grippiest of any ski boot I've seen outside of non-compliant tour boot world. It's so damm nice for sketchy boot packs and it's ready to click into my race skis or freeride skis for mid-day ski swapping.

Thanks!

You could take a look at mine one day at Bach if you want since I'm not sure if any shop in Bend stocks K2 boots. I have a pair of 130s right now and am going to get 140s before next season.

They're sick boots. Only problem I've had is getting them off when I tore my calf. I totally forgot I could have just popped the BOA off.

abjectwoeYou could take a look at mine one day at Bach if you want since I'm not sure if any shop in Bend stocks K2 boots. I have a pair of 130s right now and am going to get 140s before next season.

They're sick boots. Only problem I've had is getting them off when I tore my calf. I totally forgot I could have just popped the BOA off.

doubt you are a 25.5 huh? Tore your calf this year? that sounds gnarly

deadhead420doubt you are a 25.5 huh? Tore your calf this year? that sounds gnarly

Na, mine are 26.5. I wear a size 10/11 shoes, depending on the brand, and can just fit a finger behind my heel when in the shell if that gives some reference.

I tore it in February or maybe early March. Hit a windlip, but the snow in the landing was nasty and I punched in really deep. My upper body kept going forward while my legs stayed stationary. Binding couldn't release because my legs were so deep in heavy, partially frozen shit.

Definitely would not recommend. Still not 100% and I'm sure skiing in April/May did not help that.