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Do the hole patterns for SNS, NNN and 3-pin (including Back Country variants) cross-country ski bindings match up at all, or do you always need to drill new holes in the skis when installing a different binding system?

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Out of date for 2013 / for sure! watch out and be careful good skies are expensive and brake it drilled tooooo many times . – user1006 Jan 3 '13 at 3:51

The different binding systems are of course primarily designed to provide a standard interface between the binding and the boot, not necessarily to provide a standard way of mounting the binding on the ski.

However that said I believe that the drill-pattern for SNS and NNN are generally speaking compatible, a situation that has some backing from the fact that I could find someone selling a universal drill jig for "Soloman and NNN bindings". I could not find something that ties in the older 3-pin system, but I suspect (but have no evidence for) that the mounting on the newer systems probably reflect the standard pattern of mounting the on the 3-pin system.

You should also be aware that in 2005 the NIS (Nordic Integrated System) was introduced, that uses a rail bonded to the ski that is compatible with both NNN and SNS bindings - so no drilling required with compatible skis.

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Sweet - thanks @Ste – iandotkelly Jun 6 '12 at 13:18
    
I'm not sure this is correct. And I have yet to find any SNS bindings that fit on NIS plates (without drilling holes at least), see: sports.stackexchange.com/q/2150/323. – newenglander Jan 24 '13 at 10:08
    
@newenglander can anyone verify whether the hole pattern is compatible? I'm looking into swapping the existing SNS Pilot bindings for NNN myself on some used skis I bought. – Mike Eng Jan 12 at 21:11
    
I found this reference stating that "The SNS bindings use the same spacing (as NNN) in the front 3 holes, but the balance point is different." It's unclear whether the remaining two holes are compatible. – Mike Eng Jan 13 at 3:17
    
@MikeEng Sorry I haven't found out definitely either. Post here if you do find out! – newenglander Jan 13 at 23:02

The hole pattern is the same for NNN and SNS binding systems, but they are placed differently with reference to the balance point of the skis. In other words, the holes don't go in the same spot for the two systems. Plug the old holes and drip hot p-tex to seal them, then drill in the correct spot for your new system.

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