The SOK binding decreases the global weight of the equipment, and provides a better stability on the way up. Downhill, this binding allows to be more precise specially on steep lines or hard snow. The low tech (walk mode) option is possible with the PEKYE which is not an adaptator, but a real low tech toe piece designed and produced for splitboards (using the 3 brackets inserts standard).
The only hard-boots binding wich allows you to hike-up with the bindings on your feet.
Data sheet :
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A Spark R&D original tech toepiece designed for the split-hardbooter. With its integrated splitboard touring bracket hole pattern, this tech toe doesn’t need a toe adapter, saving weight, unnecessary parts, and expense. It also sits lower on the board giving a more direct feeling to touring.