03/20/2012
For the backcountry skiers out there:
REVIEW: Dynafit's TLT-5 TF-X
(Note: The Dynafit TLT-5 TF-X model from the first year 2010/2011 had a cuff problem. If your cuff is splitting across the instep you can probably send them in for a new pair to Dynafit USA no questions asked: 1711 15th Street, 2nd Floor Boulder, Colorado 80302-6352)
If you haven't heard of Dynafit's TLT-5 boots you haven't been paying attention. OR you have simply been assuming that there are a bunch of people skiing gnarly lines in tennis shoes over the past two seasons. That's how flexible, lightweight, and game-changing these boots are. These boots fundamentally break the mold. (Keep in mind that the TLT-5 TF-X is the 'consumer' version from Dynafit. They also make the carbon fiber TLT-5 Performance TF and DY.N.A Evo which are even lighter)
First, they are mind blowingly light weight. At only 1350g per boot (compare with Scarpa's 1530g Maestrale) they cut valuable grams off of each step.
Second, and most importantly in my opinion, they have incredible cuff rotation. The upper boot bends about as far back as my tendons so there is no abbreviated gait that is characteristic of most AT boots. No longer do you need to wobble and balance from rock to rock as if you are learning to walk again. You can bound and flex to your heart's contentment.
Third, they have a rockered sole and bomber crampon compatibility that makes them climb like a mountaineering boot. I have climbed M6 in them and was more limited by the scary exposure than I was by the boots.
As with all things there is a downside:
Wear: These uber lightweight boots do wear particularly heavily. If you use them simply for AT skiing, they will last a long time. But if you want to take them ice and mixed climbing and on extended alpine routes, expect them to wear out within a couple of seasons. The lower buckles on my pair bent markedly after only a few uses and then wouldn't stay closed while walking in snow after that. I fixed that problem by drilling a hole in the end of the buckle and looping a tele leash through the hole, passing under the arch of the boot, and clipping it into the buckle on the medial side. Annoying, but a workable solution.
Warmth: The TLT-5 TF-X come with a mediocre liner, that, frankly, is not suited for extreme cold. If you want to take your TF-X to Alaska or extended winter trips upgrade to a Intuition liner or equivalent. The Performance comes with this improved liner. I took my TF-Xs to Alaska with an overboot but without upgrading the liner and nearly lost toes.
For more information about these boots from some elite alpinists check out:
http://coldthistle.blogspot.com/2011/06/part-2.html