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Kahtoola KTS Crampons Review

Kahtoola KTS Crampons

Kahtoola’s KTS Crampons are a winter traction aid designed for use with trail runners and soft-soled shoes. This is important in spring when the base of peaks have no snow, but you need to bring along traction to deal with lingering ice on high ledges and summits.

Kahtoola KTS crampons



Kahtoola's KTS Crampons are a winter traction aid designed for soft soled shoes. They have a flexible center bar that won't break with trail runners.

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Design-wise, the KTS Crampons are optimized for soft-soled trail runners. Trail runners can bend and twist in multiple directions, unlike hiking or mountaineering boots, putting considerable structural stress on rigid crampons and possibly breaking them. While the KTS crampons borrow their basic design from old-school crampons, they behave very differently, providing a dynamic and adaptive traction system that flexes with a soft-soled shoe and not against it.

The KTS Crampon Binding System

The design of the KTS Crampon binding system is what makes this product work so well with trail runners. It has three main components: an adjustable leaf spring that controls the distance between the two ends of the crampon, front webbing straps that secure the ball of your shoe to the crampon front, and an ankle strap/heel guard that keeps the back of your shoe on the back crampon. Let’s look at each of these in turn:

The Leaf Spring

First, the leaf spring is extremely flexible, adapting to the flex of a trail runner’s sole when climbing a slope. While the flex prevents the leaf spring from breaking, it also keeps the spring close to the shoe’s sole so that the two remain in alignment.

When you bend the sole of your shoe, its length temporarily decreases. To remain in alignment, the length of your crampon must stay in synch and shrink dynamically, or else your shoe will slip sideways out of the crampon binding. While there is some heel lift, I think it’s a creative solution to an interesting design problem.

KTS Crampon Binding Adjustment
KTS Crampon Binding Adjustment

You adjust the leaf spring length using a conventional crampon adjustment system. It’s best to set these up, way in advance of needing to use them and to adjust them as tightly as possible, to keep your shoes aligned with the crampons when they flex.

KTS Crampon Front Binding
KTS Crampon Front Binding

The Front Binding

The binding at the front of the KTS crampon is made of webbing attached to the front points and the sides of the crampon using hinged attachments. The webbing is fed through a two-way plastic buckle located above your toes, that crosses the straps over each other diagonally. The plastic buckle also keeps the straps from digging into the top of your foot, where the fabric of a trail runner is thin and not padded. The side hinges are crucial for keeping the ball of your foot over the front spikes, but they are flexible and will conform to the width and shape of your shoes. Like the leaf spring, the front binding is designed to keep your shoe in the crampon, but can also dynamically adapt to the torsional stresses that a trail runner exerts on the crampon frame, via the flexible side hinges.

The Heel Binding

The KTS heel binding is quite similar to those used on many other strap-on style crampons, with a piece of webbing attached to a back bailing wire that hooks onto your laces. As long as the leaf spring is short enough and the ankle strap is secure, it is very unlikely that your heel will pop out of the heel binding.

Product Comparison

How do the KTS Crampons compare to Microspikes and the Hillsound Trail Crampon Pros?

  • The Hillsound Pros are less comfortable than the KTS crampons when worn with trail runners because the ratcheted binding puts pressure on the top of your shoe to hold against the front crampon. This is barely noticeable if you are wearing a pair of winter boots, but it’s really uncomfortable with trail runners because they don’t have a rigid or padded toe box.
  • The rigid leaf spring on the Hillsound Pros is very uncomfortable when worn with a soft soled trail runner. Boots have a lot stiffer shank and are much more comfortable when worn with the Hillsound Pros.
  • The front bindings of the KTS crampon are difficult to adjust and it would be challenging to try to use them with different shoes and/or boots. By comparison, the Hillsound Pros are easy to use and fit with different shoes or boots, on the fly.
  • The KTS Crampons will rust. Dry them off after each use, if you want them to last.
  • While Kahtoola’s Microspikes work with all shoes and boots, they’re not as comfortable as KTS crampons when worn with trail runners, and may be insufficient for more gnarly ice, where longer crampon teeth are preferred.


If you use trail runners exclusively for hiking or peakbagging in winter, investing in a pair of Kahtoola KTS Crampons probably makes sense. Although expensive, they are quite comfortable to wear and provide very good traction for trail runners and soft-soled shoes. If you wear different shoes in winter, you must decide if it’s worth having different traction systems or if you want one traction system for all of them. If you decide to purchase just one winter traction system, I’d try a few more alternatives before using KTS crampons with multiple styles of shoes or boots.

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Disclosure: The author received a pair of the KTS Crampons for this review.

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