UKC

Petzl Fil-Flex on Black Diamond Crampons

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 Connor Seddon 20 Aug 2025

Has anyone tried using the Petzl Fil Flex adaptor on Black Diamond crampons, specifically the Snaggletooth?

I currently climb in La Sportiva G5 Evos (B3) with BD Stingers (C3), but for faster, lighter objectives I’ve picked up a pair of La Sportiva Trango Pro GTX (a stiff B2). The Snaggletooth seems like the ideal crampon for these boots, but BD only make it in a fully automatic (C3) version.

The Petzl Fil Flex converts their own C3 crampons into a semi-automatic (C2) setup, and on paper it looks like it should work with other brands too, unless there’s a mismatch in the diameter/fit of the front bail.

Has anyone tried this combo, or know if it works in practice?



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