How to Choose Crampons

Choosing crampons comes down to five decisions, made in order: terrain → point design → material → binding → fit. Get them in that order and the right model falls out almost automatically. This guide walks through each decision and links to the deeper page on every branch.

One thing first. A crampon lets you stand on ground you could not otherwise stand on. It does not make a steep slope safe, and it does not replace the axe skills and instruction that ground demands.

Decision zero: do you need crampons at all?

Many readers who land here need microspikes rather than crampons. That is a terrain judgement, not a question of budget or seriousness.

Microspikes are an elastomer harness with a chain and short spikes, around ~10 mm, pulled over any footwear. They stop a skid while your weight presses straight down, but with no rigid platform and nothing past the toe they cannot hold an edge. Crampons are a steel frame clamped to a stiff boot, with long points underfoot and points at the front you can kick with.

Microspikes are for ground you walk across; crampons for ground you would otherwise slide down. Spikes give confidence before they give security and let go without warning once a slope steepens or hardens. If the first describes your winter, start and stop at microspikes.

Decision 1: What terrain, honestly?

Not the terrain you aspire to — the terrain you'll cover this season. Four honest answers cover almost everyone:

If you're torn between the first two rows, the test is this: would a slip accelerate? On flat or gently rolling ground, no — microspikes. On a slope where you'd slide, yes — crampons, stiff boots, and an ice axe you know how to use.

Behind that table sit two inputs: steepness and surface hardness. Treat these bands as approximate, since eyeballed slopes are routinely overestimated.

• Below roughly 20 degrees. Walking ground; short spikes are enough.
• Roughly 20 to 30 degrees. The grey band, where the surface decides. Soft snow is trivial; firm snow is where people get hurt, because it feels walkable until it is not.
• Roughly 30 to 40 degrees. Edging, kicking steps, front-pointing — rigid platform, steel at the toe, axe in hand.
• Above roughly 40 degrees. Technical ground, with the training and protection the route demands.

Névé — old, refrozen snow — takes a point beautifully and a boot edge barely, which is why it catches people out. Conditions decide this, not the calendar.

Decision 2: Point count and geometry

10 points — glacier walking and ski touring; lighter, no aggressive front-pointing. 12 points — the general mountaineering standard, with horizontal front points for kicking steps. Technical (12–14, vertical or mono front points) — steep ice and mixed. More points aren't better; they're more specialized. Full breakdown with diagrams: crampon points explained and mono vs dual.

The step from 10 to 12 happens in one place: the secondary points, just behind the front points, which bite behind a placement and turn a single spike into a small tripod. Above 12, the extra points sit at the toe for hooking rock — useful to a few climbers, dead weight to everyone else.

Cross-section matters more than the count. Horizontal points spread load across a broad edge and hold in névé: the mountaineering geometry. Vertical points concentrate weight and penetrate hard water ice, superb on a waterfall and useless in soft snow. T-section splits the difference for long alpine routes. Mono versus dual only matters on steep ice; dual is where almost everyone should start, and modular models convert either way.

Decision 3: Steel or aluminum

Steel bites harder, survives rock, and lasts a decade. Aluminum weighs roughly half as much and wears out fast on anything but snow. The rule: aluminum only if you'll almost never touch rock or hard ice — which in practice means ski touring and easy glacier travel. Hybrids (steel front, alloy heel) like the Petzl Irvis Hybrid split the difference well. Full comparison: aluminum vs steel crampons.

A steel 12-point pair typically lands around ~900–1,100 g, a full aluminum 10-point around ~500–600 g. Weight at the end of the leg costs more than weight in the pack, so that saving is worth having on a long ski approach and irrelevant on a short glacier walk. What steel buys is section: alloy points blunt after one rocky approach, and a rounded point needs harder kicks for the same bite.

Treat this as a rule rather than a preference: alloy points are for snow. Not rock, not hard water ice, and not a route where you might meet either by surprise.

Decision 4: Binding system

Bindings must match your boots, not your ambitions:

• Strap-on (C1): webbing cradles, fits any stiff boot with no welts. Most versatile, least precise.
• Semi-automatic (C2): heel lever + toe strap. Needs a heel welt (B2 boot). The sweet spot for most mountaineers.
• Automatic / step-in (C3): wire toe bail + heel lever. Needs toe and heel welts (B3 boot). Most secure for technical climbing.

Photos of each welt type and the full C/B rating system: binding types and boot compatibility.

This is not a taste decision. Look at your boots, find the welts or their absence, and the binding is chosen for you. Brand naming hides how few options there are.

If a name is unfamiliar, look at the toe: a wire bail means automatic, a cradle plus heel lever means semi-automatic, webbing at both ends means strap-on.

Decision 5: Fit

A correctly adjusted crampon stays on a swinging boot before the straps are done up. Adjust the linking bar so the boot snaps in with light hand pressure, check front points project 20–30 mm, and test-fit at home, not at the trailhead. Step-by-step with brand quirks: crampon sizing guide.

Stiffness first, welts second. A crampon is a rigid frame under a sole, and if the sole bends the frame cannot. Every step on a flexible boot levers the crampon against its mounting points until the toe cradle lifts or the heel lever pops, and no amount of strap tension rescues that.

The flex test takes ten seconds: hold the boot at heel and toe and try to bend the sole by hand. A B3 barely moves, a B2 gives a little through the forefoot, a B1 flexes but holds a line. A trail shoe folds — microspike footwear, whatever the crampon box claims to fit.

Buy this if you are…

The five decisions collapse once you name the person doing the walking.

If two rows describe you and one is the mountaineering row, buy the mountaineering crampon. A 12-point steel semi-automatic covers everything above it and only gives ground at the extremes. Check price on Amazon

Putting it together: quick recommendations

• First mountaineering course: Grivel G12 or Petzl Vasak, semi-auto if your boots have a heel welt. More options: best for beginners.
• One crampon for everything alpine: Petzl Vasak Leverlock.
• Getting into waterfall ice: Petzl Lynx — mono/dual modularity means you won't outgrow it.
• Ski mountaineering: Irvis Hybrid or a full-alu option from this list.
• Icy dog walks and trails: Kahtoola MICROspikes. Done.
• Tight budget, real mountains: best budget crampons — safe brands only.

Common mistakes

• Buying crampons before boots. The boot decides the binding. Reverse the order and you buy twice.
• Buying for the route you dream about. Technical crampons are tiring on approaches and clumsy on snow.
• Alloy on the wrong ground. A saving that costs your points on the first rocky approach was never a saving.
• Sizing at the trailhead. Cold hands in the dark is how linking bars end up in the wrong hole.
• Assuming fit is done once it feels snug. Crampons work loose; re-check after twenty minutes and after any long descent.
• Unbranded crampons for consequential terrain. Cheap is fine; anonymous is not.

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