Kahtoola Traction Devices: The Full Lineup Compared
Kahtoola is a traction specialist, not a crampon manufacturer. The company built the category the rest of the industry now copies — a stretchy elastomer harness that pulls over any shoe, with hardware underneath — and it has spent twenty years refining that one idea rather than chasing alpine hardware. There is no Kahtoola for glacier travel, no Kahtoola for waterfall ice, and the brand does not pretend otherwise.
What Kahtoola does have is a ladder. Each rung adds spike length and takes away comfort, and the rungs are separated by millimetres that matter enormously underfoot. Most buying mistakes in this range are not brand mistakes; they are rung mistakes. People buy MICROspikes for a paved commute and find them clattery and harsh, or buy EXOspikes for genuinely glazed trail and find themselves skating. Read the ladder, then pick your rung.
| Model | Traction elements | Length | Weight (pair) | Role |
|---|---|---|---|---|
| NANOspikes | ~10 carbide studs per foot | ~1–2 mm | ~200 g | Road running, pavement, hard-packed surfaces |
| EXOspikes | ~12 tungsten-carbide tips per foot | ~2–3 mm | ~210 g | Mixed winter running — ice, tarmac, frozen dirt |
| MICROspikes | 12 stainless spikes per foot | ~10.4 mm | ~340 g | Icy hiking trails and packed snow — the benchmark |
| K10 | 10 stainless points | ~19 mm | ~600 g | Steep snow-covered trails, deep firm snowpack |
| KTS Steel / Aluminum | 10 points on a hinged frame | ~19–20 mm | ~650 g steel, lighter in alloy | Hiking crampon with a real frame and front points |
Figures are approximate catalog values for medium sizes and vary by size and production year. Confirm against the current listing before ordering. Kahtoola has sold the KTS under both steel and aluminum names over the years — the alloy version is noticeably lighter and wears far faster on rock, so check which one a listing is actually for.
The decoder: spike length is the whole specification
Ignore model names for a moment and read the middle column of that table. Traction devices work by penetrating a surface, and how far a point reaches determines what it can reach into.
1–3 mm (NANOspikes, EXOspikes). Carbide tips scratch rather than penetrate. They bite frozen dirt, gravel, rime-glazed rock and hard-packed snow, and they are comfortable enough on bare pavement that you stop noticing them. On thick smooth ice there is very little engagement, so they feel adequate rather than secure.
~10.4 mm (MICROspikes). Long enough to punch through a polished crust into the firmer material underneath, short enough to walk a connecting stretch of road without feeling like stilts. This is the length that made the category, and for the ice most hikers actually meet it is still the right answer.
~19–20 mm (K10, KTS). Crampon-length points on a hinged frame that bends with a soft boot. When a trail is buried in 40 cm of consolidated snowpack, short spikes ride the surface and skid — these reach in and give you a step that holds. The cost is weight, bulk, a strap binding that takes minutes rather than seconds, and points long enough to be an ankle hazard on soft footwear.
The second decoder is sizing, which causes more unhappy buyers than grip ever does. Kahtoola sizes by shoe size in bands (small through extra-large), and the harness is sized to the outsole, not to your foot. An insulated winter boot has a much bigger footprint than a trail runner in the same nominal size, so size to the footwear you will genuinely pair the device with. Between bands, go up for bulky boots and down for runners. A correctly fitted harness needs a firm pull to seat and then sits taut with the hardware centred; if you can rotate it around the shoe by hand it will migrate off the toe on a descent. Check the current chart on the listing rather than trusting a number you read somewhere — bands shift between models, and the K10 and KTS use a frame length adjustment on top of the size band.
Which Kahtoola for which person
- One device for everything (most people): MICROspikes. Icy trails, packed snow, frozen approaches, a pair in the car all winter. They lead our microspikes roundup for a reason.
- Winter runner on mixed ground: EXOspikes. If the route alternates ice, wet tarmac and frozen dirt every few minutes, these are the ones you will keep on your feet instead of taking off. More options in the winter trail running spikes roundup.
- Road runner only: NANOspikes. Minimal studs, minimal weight, no trail pretensions. Overmatched by anything with a gradient.
- Steep winter trails where microspikes are skating: K10 — but only if you have actually found that limit, not because it sounds more capable.
- Hiking crampon with a frame and front points: KTS. The older, longer-running sibling of the K10, same envelope: flexible boots, snow-covered trails, moderate angles.
- Anything above a snowy trail: none of the above. See the boundary below.
Where Kahtoola stops. Every device on this page is a trail and pavement product. None has a rigid frame, none locks onto a boot welt, and only the K10 and KTS have points long enough to call points. Once a slope is steep enough that a slip would slide rather than stop — roughly above 30–35°, and always on hard alpine ice, couloirs, glaciers or icy scrambles — the equipment changes completely: stiff boots, a full steel crampon, an ice axe and practised self-arrest, plus instruction in using them together. Traction devices reduce slipping; they do nothing about consequence. Work through when do you need crampons and microspikes vs crampons, and if you land on the crampon side of the line, start with the mountaineering crampons roundup instead of buying up this ladder.
Buying notes
Kahtoola rarely discounts, and the range is the most counterfeited in winter traction — lookalike harnesses with soft rubber that stretches out permanently after one season are everywhere. Check the seller, and check the size band against the exact footwear you plan to use. Kahtoola backs the range with a two-year warranty and honours it, which is worth something in a category full of anonymous listings.
MICROspikes on Amazon EXOspikes on Amazon NANOspikes on Amazon K10 on Amazon KTS on Amazon
FAQ
Which Kahtoola should I buy first?
MICROspikes, unless you know your winter is either almost entirely paved or almost entirely steep firm snowpack. They cover the widest band of ground, they fit everything from trail runners to insulated boots, and they are the device people keep using rather than leaving at home.
Are Kahtoola devices actually crampons?
Only the K10 and KTS come close, and even they are flexible hiking crampons: hinged frames, strap bindings, no boot welts. MICROspikes, EXOspikes and NANOspikes are traction devices with short spikes or studs. For glaciers, alpine faces or anything needing front points, buy stiff boots and a 12-point steel crampon.
EXOspikes or MICROspikes?
If you would describe the route as icy, take MICROspikes. If you would describe it as wintry — cold, hard, mixed surfaces — take EXOspikes. Hikers moving slowly on iced trail want penetration; runners covering varied ground at speed want the device to disappear underfoot.
How long does a Kahtoola device last?
Many seasons. Stainless spikes and welded chains do not corrode, and carbide tips barely wear even on concrete. Most sets are eventually retired because the elastomer harness splits at the toe, not because the traction failed. Rinse road salt off and dry them fully before storage.