Sizing your touring boots

Hey folks,

I’ve been mulling over the intricacies of boot fitting for ski touring, and it got me wondering what conventional wisdom on the forums trends towards.

I’ve got tricky feet to fit in ski boots. (Very) High instep, bony ankle, medium width, skinny heel.

With alpine boots, I’ve spent numerous sessions working with a fitter to get myself in to a ~10mm shell fit - but it wasn’t pretty (chilblains and frostbite on my toes, a nondescript pinky toe injury that has resulted in my left foot being constantly swollen, and numb / cold feet that require heaters). I love (LOVE) how these boots ski, but they can be punishing on cold days for more than 7-8 hours of skiing.

Flip to my touring boots, they’re probably around a 17mm shell fit (I measure 255mm and these are 25.5). They’re wider than I need, roomy on top, and generally don’t cause me much grief (maybe cold feet if I’m booting up something for an hour). They can feel a bit vague in shit snow or if I’m not getting right on top of my ski.

For those of you getting after it, skiing your hardest lines out of bounds, spending 9+ hours in your boots - how do you balance your uphill and downhill performance? I’ve always been curious about sizing down to something closer to a race fit for touring, but I’m legitimately afraid it might cost me some toes or long term nerve damage.

Great question and something I still haven’t really answered. I have fairly similar feet.

Currently touring on ZGPTs in 25.5 and Scarpa F1 XTs in 26.5/27 with a 26.5 Palau liner. Tecnicas are a 1 finger fit: Scarpas are a 1.5 finger fit.

The ZGTPs is a true performance fit on me, and not that different than my resort boots. I can ski big days in them, but as my foot swells, my metatarsals get squeezed. Tolerable, but I’m always excited to take those boots off. The scarpas are not as precise while skiing, but I don’t really have an upper limit on how long I can ski them.

So really, to answer your question, I like having a performance boot and a comfort boot in the quiver and decide based on how long the day will be, or what type of terrain I expect to ski.

same size for touring and alpine

I measure 27. I went with the conventional wisdom of sizing down my khions are they are punched to the max. I used to tour with them. My toes can't take it anymore. I probably did some damage to my foot. Now I use them with zipfits as resort boots and they are great. I wanted a good heel hold and even sized down I only got the fit I wanted with zipfits. My next boots were 2x Mercury. I went 27.5 and fit is ok, but touring in them has been comfortable. I don't think I will ever go with a boot that the toes touch the toe box. If you have a very competent boot fitter maybe size down. Dunno I have yet to find one that I click with.

I like a precise, performance fit in both if possible. Tried the comfort fit once for the touring boot and ended up with an epic blister that left me on the bench for 3+ weeks, even with inbounds boots. Plus the loose boots ski like shit, especially in shitty conditions when you need them to perform the most. Something that has helped me a lot over the past couple of years in dealing with feet swelling is compression socks. Use them for everything and not going back. I use the merino CEP's because I've got a proform but would like to try others.

I like the performance fit until I do some stupid adventure that involve downhill skinning or other shenanigans. Then I swear I'll get a larger shell size for my next boots. Then a month or year goes past, the toe pain is forgotten and I find myself doing something stupid in the same boots as before and the cycle repeats.

That probably says more about me than the benefits of a tight shell fit. But really, the next boots I'm going for a bit more space..... I swear....

Edit: That said I don't ski that hard in the backcountry but am usually in my boots for 6+ hours.

I had the same size for both when i had resort boots. My patrol career left me with nerve damage, and in combination with trips to very cold places i tend towards the comfy end of things. This certainly means a tradeoff in downhill performance but it’s worth it to me to avoid further injuries. I’m not entirely sure what my shell fit is though, so no precise data points.


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My feet measure about 295 mm long, and I wear US 13 or 14 depending on the shoes.

I've got both size 29 resort and touring boots. I was fit into the touring boots by GregL a couple pairs ago, and he did a couple punches. In the past, I used to use size 28 inbounds but those required too many punches, honestly. I am considering going up to a 30 in my next touring boot because I think I can make it work and want more space for my forefeet.

It kind of depends on the boot model. Some touring shells are a bit short to save weight.

I often find that my new touring boots fit great on normal pow yo-yo laps, but when I get a big day they start to feel cramped. Then I need to get another punch. I am pretty convinced your toes should not feel cramped at all in your touring boot, ever. They need to wiggle and splay as you walk and stride. Finding the right combination of that comfort but decent heel and instep hold is tricky.

Also, you need a bit of extra width for your feet to bulge outwards as you walk. I don't see those little bits of extra space making a huge performance decrease to worry about it.

I measure 27.5 and I'm in 27.5 in done and touring boots.

They are pretty comfortable, but i punched then to get more width, because i got Morton's neuroma 10 years ago because of too narrow boots.

I can easily wiggle my toes and i have room laterally in the forefoot.

For me, to ski well in bad conditions, the upper 2 buckles need to be pretty tight, and the forefoot can be loose



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I'm in the camp of having bigger touring boots than resort boots. 90% of touring is walking so I'm okay with sacrificing a little performance during the 10% to get better comfort and circulation during the 90%. I wear a 12 and my resort boot is a 28.5, touring boot is a 29.5

Depends on what touring boot. I always ski a 26.5 alpine boot (measure 27.7 on a Brannock), but have had to size up in a number of touring boots (TLT5, TLT6 first two generations, Quantum Asolos, Zero G Peak). I've been able to make a 26.5 Backland Carbon (2 different generations) work with about a 4mm toe punch.

Greg what prevents you from downsizing those boots?

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Originally Posted by Cocximus

Greg what prevents you from downsizing those boots?

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They were/are too short. Still getting over a toenail trauma from last July on Rainier with the "26.5" Peak Carbon. If you look at the current crop of 1000-1200 gram boots, many have BSL's of 288 or so (my Redster CS is 305mm for comparision) and they realistically run about 5mm to 8mm shorter than the same size alpine boot. The Backland Carbon is marginally longer and I made a 26.5 work with a toe length punch, but for the rest I needed to go to the next mondopoint size. Keep in mind that the short strand carbon-reinforced shells can't be punched like regular Grilamid. I actually might have been able to ski in a 26.5 Dalbello Quantum Asolo Factory but I couldn't get my foot in it; same with the first gen Skorpius.

I think I need the same size, but with more toe length/room for touring where you are walking on flat ground, downhill skinning or perhaps kicking steps - all with the upper buckles loosened which allow a slight amount of foot movement. I know because I spent Saturday riding a sled in my touring boots and one of my toenails is now a goner....

Reviving this thread to get a bit of advice on fitting a new pair of lightweight touring boots. I tried a few different options in the 1,100-1,200g range (Scarpa F1 XT, Tecnica Zero G Peak, La Sportiva Kilo, Atomic Backland Carbon) and felt a bit like Goldilocks with the Backland Carbon being just right. I tried on a 27.5 and found I have about a solid finger behind my heel in a shell fit, but tried on the liner pulled out of the boot and it's a super tight fit lengthwise. Big toe is slammed against the front of the liner. And from what I can tell, it's the 27.5 liner, not a 27.0 which I believe is the same liner but with more volume taken up with a spacer inserted underneath the insole (someone can correct me here if I'm wrong).Anyone familiar with fitting the 2025 Backland Carbon and can weigh in?

Why don’t you ask the boot fitter where you’re trying on the boots?

if the shell fit is right (5-15mm) then the liner will stretch to that size.

if you need less vertical room, add a shim

I’ve had success going a size up, throwing away the thin POS stock liners that kill the lumps and bumps on my feet/heels, and using an intuition tour wrap. Skis better, fits better IMO with little to no weight penalty


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Originally Posted by ski whore

I’ve had success going a size up, throwing away the thin POS stock liners that kill the lumps and bumps on my feet/heels, and using an intuition tour wrap. Skis better, fits better IMO with little to no weight penalty Sent from my iPhone using TGR Forums

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this is the way. size up because punching touring boot plastic requies a very good bootfiter and then work your way down to a proper fit, starting with an aftermarket liner.

I obsessed bugged a bunch of people/ Lee Lau/ studdied what was said on TGR gear talk and ordered mercury's on-line which fit perfectly with no punches just swapping in a heatmolded liner from the last boot







I can't relly suggest buying bootsonline but it worked for me I went with same size for Alpine and AT 15mm behind heel using the sharpie method






IMO if the same size doesnt fit for both alpine and AT it is very likley the rong AT boot

@rushbikes It's easy to stretch the liner toe, heat it with a hairdryer and put it over a broomstick (or heat the liner on heat stacks and use a toe cap).

Amazing, I used a contraction and didn't get '

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@Jadams Punching touring boots does not necessarily require a super experienced bootfitter, but it is different from punching performance alpine boots, particularly race boots. Most Grilamid compounds and most recent Pebax compounds punch easily, but you need to exercise care because the plastic is very thin. Bootfitters used to working with thick PU boots can find it a bit tricky at first, but they can usually figure touring shells out pretty quickly.</p>