I did some extensive carpet testing on the Fischer Transalp Pro compared to a couple of other lighter boots, so I'll add some notes here in case anyone else finds them useful. I'm trying to find a replacement for my 2017 Atomic Backlands, which have been my main touring boot for the past 3 seasons. For reference, I have wide feet and strong calves but low-volume heels/achilles. Verifyt scan below.
The Transalp Pros were 1210 grams out of the box in a size 24.5. One-finger shell fit; shell without liner was snug around the midfoot, with some pressure over the instep. I'd call the entire lower shell medium volume. The forefoot is less squared-off than I prefer, so my pinky toes were a bit squashed. The liners beefy and substantial. The gaiter attached to the shell makes it kind of a pain in the ass to insert/remove liners. ROM in walk mode is significantly better than the Hawx Prime XTD 130, with less friction overall and more degrees of flexion in both directions, especially rearward. In ski mode, the flex is softer than the Prime XTD (maybe 15-20 points, subjectively), but pretty progressive, with the top of the flex pattern being very soft. (This is at room temp, FWIW). The Prime XTD is significantly higher volume overall.
For me, the fit out of the box for the Transalp was decent, but the heel hold was only pretty good and the lower shell would have needed too much work for it to be worth it. I do think it could be a great boot if it fits your foot; the ROM is better than 4-buckle boots in the same category and the flex probably stiffens up when the plastic is cold.
I also tried the new Scarpa F1 LT. 926 grams in a size 24. I had high hopes based on all the glowing reviews but the fit made them a total nonstarter. I could barely get them on because of the tight lower shell and couldn't imagine trying to put them on after a night in a tent. Also couldn't lock down the heel well using the boa dial. They're not in the 1300 gram category anyway, so maybe no one reading this cares.
The Dynafit TLT8 Carbonio (24.5) ended up being the best fit out of the box by far. I'll need a couple of mm extra width and a bit more length over my big toes, but nothing major. The stock liner was pathetically flimsy and the fit was dramatically improved when I swapped in my MV Pro Tours. Very good ROM (a bit better than the old Backlands with tongues), nice and snug around the heel and achilles, and surprisingly stiff, though not very progressive - definitely stiffer than the Transalp Pro, at least at the top of the flex pattern. I'll need to remount my touring skis because of the stupid speed nose and short BSL, but otherwise am tentatively stoked on them. 1035g with the MV Pro Tours and custom footbeds.
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