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Cross-Country Tech Talk by Stein, Eric's Son

Ski Bindings

Bindings should be matched to the type of skis you have and the type of skiing that you do. Basically, there are four types of modern binding: 1) cable 2) 75 mm telemark; 3) backcountry; 4) diagonal stride or classical; and 5) skating or freestyle.

The cable binding is used for freeheel downhill skiing or mountain touring. It basically uses a cable around the heel of your boot to wedge your boot into a toepiece that is attached to the ski. It is very strong, simple and easy to use. The 75 mm telemark ski binding essentially a very strong version of the old 75 mm "nordic norm" cross-country binding. It is also simple, durable, but a little more difficult to use. Your boot is held in the binding by a bail that clamps down on the extended sole of the boot. The boot is located in the binding by three small pins under your toes. With both the cable and the telemark binding the boot flexes under the ball of your foot. In the old days this is where a lot of lighter touring boots would crack, resulting in wet feet on the trail. New cross-country bindings pivot in front of the toes and eliminate this problem.

The backcountry binding is a heavier version of the modern cross-country binding. The increased weight is due to the greater width and heavier construction of this type of binding. Not only is the binding wider, but the length of the attachment bar is longer and the bar is thicker. Both Salomon and Rottefella, the two biggest binding manufacturers, make a backcountry binding. This type of binding is well matched with a backcountry or touring ski.

The diagonal stride or classic type cross-country binding, is characterized by a clamp located at the front of the binding that, when closed, encircles a small bar embedded in the toe of your boot. Back of this clamp the binding may have either two thin ridges (Rottefella), or a single large ridge (Salomon), running the length of your boot and ending at your heel.

The skating cross-country bindings are similar to the diagonal stride bindings in appearance, but use stiffer flexors to hold the ski closer to the boot. The racing bindings also use a stiffer spring in the latch mechanism that attaches the ski to the boot for more holding power.

All of the bindings except the cable and telemark use rubber flexors to control the motion of the ski and keep it close to your boot while skiing. The skating bindings have the stiffest flexors and the backcountry bindings have the softest ones.

The backcountry and classic bindings also come in automatic versions, where the clamp is held in place by a spring, rather then a lever. The automatic versions are fine for most types of recreational skiing.

There is an amusing story about the origin of the name of the Rottefella bindings. The original Rottefella cross-country ski binding, designed in 1928, looked like a lighter version of the 75 mm telemark binding we still use. When the founder of the company was asked what he intended to call his new binding, he said, “Why it looks like a rat trap.” Rottefella is Norwegian for rat trap.

 

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