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Cross-country boots, like all Nordic equipment, attach to the ski usually only at the toe of the boot and are allowed to flex at the ball of the foot similarly to a normal shoe or boot. Cross-country boots generally use one of four attachment systems; NNN (New Nordic Norm), 75mm Nordic Norm ("three-pin" binding, "75NN"), d-ring, or SNS (Salomon ...
ISO 9523:2015, for boots in which the pivot is formed at the boot / binding interface. [16] The two setups are typically incompatible in that the principle by which they affix the boot to the ski is different. "Tech" bindings engage the ski boot with pins, which hold the toe down and engage with the heel in downhill mode.
Three-pin: The boot-gripping system comprises three pins that correspond to three holes in the sole of the boot's toe, used primarily for back-country skiing. Cable : A cable secures the free-moving heel and keeps the toe of the boot pushed into a boot-gripping section, used primarily for back-country and telemark skiing.
The name "Rottefella" refers to the three-pin binding invented by Bror With in 1927, inspired on a couple of rat traps he had seen in a hardware store. [2] The binding were more formally known as the "75mm Nordic Norm". The binding was the standard for cross-country skiing for decades. Rottefella also produces one of the two systems that have ...
The original Rottefella eliminated the heel strap, which held the boot forward in the binding, by drilling small holes in the sole of the boot which fit into pins in the toe piece. This was standardized as the 3-pin system, which was widespread by the 1970s. [72] It has now generally been replaced by the NNN system.
Telemark ski racer executing Telemark's unique lunging or "free heel" turn. Telemark skiing is a skiing technique that combines elements of Alpine and Nordic skiing, using the rear foot to keep balance while pushing on the front foot to create a carving turn on downhill skis with toe-only bindings.