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A touring boot with hardcore downhill performance.

Having a featherweight touring boot is awesome, but what's the point if you get to the top and find yourself paralyzed with fear because you're afraid your 32-flex tin-foil boots will collapse if you have the audacity to try and make a turn? If you're looking for a little more beef, check out Black Diamond's Quadrant Men's Alpine Touring Boot, which is light—under four pounds per boot—but boasts a burly 120 flex that'll have you ripping big lines even faster than you hiked up them. The liner's been totally redesigned to be warmer, with fully taped seams, and more efficient, with anatomic flex zones for the climb and a smooth-flexing plastic tongue for stiffness on the descent. It's also fully heat moldable, so you can kiss hot spots, pinching, and rubbing goodbye.

The Quadrant skis like a burly boot, but it also climbs like a mountain goat. Black Diamond's Triax Pivot frame gives you 40° of cuff rotation for a smooth, natural stride, and the 103mm V-shaped locks gives your foot plenty of room but locks your heel ankle in place for comfortable blister-free touring. Black Diamond finished the Quadrant off with a rockered rubber sole and integrated tech fittings for easy hiking and skinning, and tossed in a beefy power strap for improved downhill performance.

  • Triax plastic shell
  • 120 flex
  • 103mm V-shaped last
  • Thermomoldable Efficient Fit AT liner
  • Liner with a plastic tongue, flex zones, and taped seams
  • Triax Pivot frame with 40° of cuff rotation
  • Rockered rubber outsole
  • Quickwire buckles and power strap

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Black Diamond Quadrant Alpine Touring Boot - Men's

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Here's what others have to say...

Unanswered Question

What is the exact boot sole length in mm of a Mondo 28.0 in the new Quadrant? I'm trying to figure out if I need to remount my bindings.

Are these compatible with salmon guardian bindings or does it have to be tech touring binding?

Responded on

I know its late but It will work I use the prime in mine and had the room to get the gap needed and the release to work like it should it mite take a tad bit more force to release but not that much that it would keep you in

4 5

Light is right

  • Familiarity: I've put it through the wringer

BD has been making a variety of different AT boots over the years and they have done a great job with the Quadrant. It offers a lugged sole for excellent grip when hiking, and the tech-binding compatibility is rock solid. The lightweight buckles seem to be plenty durable even after several seasons of 50+ backcountry days. I replaced the velcro strap with a Booster Strap and it greatly increased the comfort and predictable flex of the boot. The walk mode is durable and easy to use. It is a great blend of uphill and downhill performance. I have a narrow lower leg and ankle, so these were a bit loose to be honest. I think they are a great boot, but for Low Volume anatomy, you may want to look elsewhere.

5 5

True to Flex Badass Boot

  • Familiarity: I've put it through the wringer

While there really is no standard for flex across the ski industry in my experience (25+ skiing, 10 racing, 7 race coach) these are as close to a stiff alpine feeling boot while still having the lightweight feel and maneuverability of a touring boot. You will want to play with the amount of forward lean that you set the boot to -- initially it is set up very upright which is great for walking/skinning etc but not forward enough for aggressive skiing. Just loosen the cuff and make 1 easy run making relaxed turns and then tighten the boots to that approximate forward lean (don't choose a powder day to do this). The overall fit of the last was in my opinion a bit wide; however, as with many boots this can be overcome with a custom liner. I would highly recommend that if you do get the Quadrant you consider purchasing Intuition custom liners through your local shop -- warmer and better fit which is key when you may spend 10+ hrs in the the boots (or sleep in them which I have done). Overall an excellent boot.