Nordic Ski Bindings
- an explanation
 Cross country ski bindings can be a confusing topic to sort out. It has caused many frustrations for both new and experienced skiers alike, when one realizes that their new system may not work with their older gear, or worse yet, they bought the wrong boot for their binding system. Let’s get it straightened out here to help minimize any confusion and future problems.
There are two systems of bindings; SNS (25mm wide) and NNN (30mm wide). They were developed by competing manufacturers and rather than standardize bindings, they created two incompatible binding systems. Within each system are 3 categories that are used for cross country skis: skate, classic and backcountry or BC bindings. A fourth style that is not part of the dual system, but is used on heavier touring skis, is the traditional 3-pin binding.
Currently, Salomon and Atomic are using the SNS system, and Fischer, Alpina and Rossignol are on the NNN system. A closer look at the systems shows us that the width of the binding and the boot sole design are the reasons for the incompatibility.
The SNS system has two types of skate and classic bindings: Pilot and Profil (pronounced: pro feel). Pilot bindings have two connection points between boot and binding, and Profil has one. It is important to remember that PILOT BOOTS CAN BE USED ON EITHER PILOT OR PROFIL BINDINGS, BUT PROFIL BOOTS CAN ONLY BE USED WITH PROFIL BINDINGS.
Classic and Skate binding differ as well. Classic bindings have bumpers in front of the binding connection. These bumpers help with ski control and restrain the boot/ski angle during the kick phase.
BC, or backcountry bindings, are used on touring and light touring skis. BC bindings are heavier than Pilot or Profil and the width of the boot/ski connection is wider, providing greater torsional control over a heavier ski. The wider binding can provide greater support in unbroken or ungroomed snow. BC boots are incompatible with Pilot or Profil bindings, and vice versa.
Three pin bindings are wider still at 70mm. Rather than use an axel and clamp design like the others, three pin bindings use a three pin design on the binding and a matching three hole design on the soul of the foot with a clamp on an extended soul in front of the toe. These bindings are used for rugged touring and heavier skis. Of note, the 70mm width of these bindings do not fit well within groomed tracks/rails.
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