Dynafit has an available OEM “rotation lock,” “anti twist” part you can install on your Radical series bindings to prevent counter-clockwise rotation (“auto rotaton”) when the heel unit is in the climbing position. Click the following “read more” link to view a how-to image from Dynafit, or you can download a PDF here. The item is part number 48684 and can be obtained from Salewa North America
Salewa Dynafit made these anti-twist rotation lock installation instructions available some time ago, but folks have had a bit of trouble finding them, so I'll make a blog post out of it that'll be easy to google.
WildSnow.com publisher emeritus and founder Lou (Louis Dawson) has a 50+ years career in climbing, backcountry skiing and ski mountaineering. He was the first person in history to ski down all 54 Colorado 14,000-foot peaks, has authored numerous books about about backcountry skiing, and has skied from the summit of Denali in Alaska, North America’s highest mountain.
