Which crampons fit your boots?

Prices and stock read Nov 4, 2026.

Check two things on your boot, in this order: how stiff the sole is, then whether there's a groove or ledge at the heel and the toe. Those answers decide which crampon styles can stay on your foot.

Your boot How stiff is the sole? Is there a welt or groove at the heel? Is there a welt or groove at the toe?

Answer all three and your result shows up here.

The three styles

Strap-on. Fits nearly any boot and needs no welts. REI says it can allow a little movement between boot and crampon, and that the bar's flex has to match the boot. If you're unsure, this is the safe style.
Semi-automatic, also called hybrid. A toe strap or bail up front and a lever at the heel. REI says it needs a stiff sole and a heel groove to hold the lever.
Step-in, also called automatic. Needs a rigid sole and, per REI, at least a 3/8 inch welt at both heel and toe.

Match the stiffness too

Needle Sports rates boots B1 to B3 and crampons C1 to C3. The rule: crampons shouldn't be stiffer than the boot, or they may fall off or hurt your ankle.

Boot rating	What it is	Crampons it can take
B1	Flexible, trekking and hill walking	C1 (flexible)
B2	Semi-rigid, mountaineering, easier snow and mixed	C1 and C2 (semi-rigid)
B3	Fully rigid, mountaineering, ice and mixed at all grades	C1, C2 and C3 (rigid)

Needle Sports calls these simplified guidelines, not strict rules. They also warn that some boots carry a step-in style heel ledge "to look techy" when they aren't. If you can't tell, a strap-on crampon is the safer buy.

The boots on this site

Boot	What the stores say it takes	So it should also take
La Sportiva Nepal EVO GTX	Step-in	Semi-automatic and strap-on
La Sportiva Nepal Cube GTX	Automatic and semi-automatic	Strap-on, and step-in per REI
Scarpa Mont Blanc Pro GTX	Automatic and semi-automatic	Strap-on

The last column applies the rules above. The stores don't state it. Try the crampon on the boot before you rely on it.

One crampon that could be confirmed: Petzl Vasak Leverlock Universal

A 12-point steel crampon with anti-balling plates. Feathered Friends lists it at $209.95, and Backcountry shows a Vasak 12-point at the same price on a Scarpa boot page. Published weights run from about 1 lb 13 oz to 2 lb (822 to 892 g), depending on the front attachment and who is weighing. The version with the universal binding takes both step-in and semi-automatic fitting.

One catch from Needle Sports: the heel is too narrow for wide high-altitude mountain boots. It suggests the Grivel G12 or Air Tech for those. Backcountry's Vasak page said out of stock on Nov 4, 2026.

Vasak at Feathered Friends Vasak at Backcountry

Black Diamond

Black Diamond's own store listed two strap-on crampons on Nov 4, 2026, the Contact Strap and the Neve Strap, and both were out of stock. The Neve is a 10-point aluminum crampon. Alpine Ascents tells its Rainier students not to bring 10-point or aluminum crampons and asks for 12-point steel with anti-balling plates, so the Neve is a glacier-walking tool, not an ice one. Black Diamond also says the Neve can't ship to California, New York or Colorado because it contains PFAS.

Contact Strap at Black Diamond Neve Strap at Black Diamond

Sources

Every page below was read on Nov 4, 2026.