NNN vs SNS vs Turnamic vs ProLink
By Sierra Marlowe · Fit, Sizing & Standards
Cross-country bindings fall into three families, and they are not all interchangeable. The NNN family (NNN, ProLink, Turnamic) shares one boot-sole norm and is mutually cross-compatible; SNS (Salomon’s older system) is its own dead-end standard; and NNN BC is a separate beefier backcountry system. This guide gives you the full boot/binding compatibility matrix, maps which brands use which system, and shows you how to identify your boot sole so you never buy mismatched boots and skis (DIN Calculator, Improve Winter, GearX).
The three binding families
Most modern XC gear you can buy new today belongs to one of three binding families:
- NNN family (NNN, ProLink, Turnamic). All three share the same two-ridge boot sole and are mutually cross-compatible — an NNN boot fits ProLink and Turnamic bindings, and vice versa. NNN is Rottefella’s original New Nordic Norm, in use since 1989; ProLink is Salomon/Atomic’s 2016 system; Turnamic is Fischer/Rossignol’s system from the 2017–18 season (DIN Calculator, SkatePro, Salomon ProLink launch release).
- SNS (Salomon). A separate, incompatible standard using a single wide guide ridge instead of two narrow ones. Salomon discontinued SNS, but it was common enough that SNS boots and bindings remain widespread on older and used gear (r/xcountryskiing, Improve Winter).
- NNN BC (Rottefella). A beefier backcountry system with a thicker toe bar and wider, deeper channels. Despite the name, NNN BC is not compatible with regular NNN, ProLink, Turnamic, or SNS — it is its own system for off-track boots (GearX, DIN Calculator).
Within the NNN family, the differences are mostly about the mounting plate and the maker’s branding, not boot fit — field testers found no huge performance difference skiing Salomon ProLink boots alongside Fischer/Rossignol Turnamic boots (Ski Haus Steamboat).
Boot/binding compatibility matrix
Does boot sole X fit binding Y? This is the chart to check before you pair any boot with a ski.
| Boot sole ↓ / Binding → | NNN-family (NNN, NIS, Turnamic, ProLink) | SNS | NNN BC |
|---|---|---|---|
| NNN | Yes — cross-compatible | No | No |
| ProLink | Yes — cross-compatible | No | No |
| Turnamic | Yes — cross-compatible | No | No |
| SNS (Profil / Pilot) | No | Yes | No |
| NNN BC | No | No | Yes (NNN BC bindings only) |
The takeaway: NNN, ProLink, and Turnamic boots and bindings all work together, so you can mix a Salomon ProLink boot with a Fischer Turnamic binding without a problem. SNS is the only modern system that does not cross over — an SNS boot fits SNS bindings only. One partial exception: an SNS Profil boot will clip into an SNS Pilot binding, but the rear bar is not engaged, so control is reduced (DIN Calculator, Nordic Ski Coach, Improve Winter).
Identify your boot sole
The fastest way to know which family your gear belongs to is to look at the sole of the boot:
- Two narrow parallel ridges running front-to-back = the NNN family (NNN, ProLink, or Turnamic) — all cross-compatible (DIN Calculator).
- Single wide ridge down the center = SNS (Salomon). It will not fit any NNN-family binding (r/xcountryskiing).
- Two wide ridges with a robust, higher boot and a thicker toe bar = NNN BC (backcountry). NNN BC boots and regular NNN boots are not compatible with the same bindings (GearX).
Plates: NIS, IFP, Shift-In
Modern performance skis come with a pre-mounted plate that the binding slides onto, so the binding can be repositioned forward or back to tune glide and climbing. The plate dictates which binding brand fits:
| Plate | Binding that fits it | Used by |
|---|---|---|
| NIS | Xcelerator (NNN-family) | Madshus |
| IFP (Integrated Fixation Plate) | Turnamic only | Fischer, Rossignol |
| Shift-In / PSP | ProLink (NNN-family) | Salomon, Atomic |
The plate only governs which binding slides on — once mounted, any NNN-family binding still accepts any NNN-family boot. If your ski has a numbered adjustment mechanism and no notches, it is an IFP plate and needs a Turnamic binding; Turnamic bindings slide onto IFP plates and will not slide onto NIS Xcelerator plates (GearX, Ski Haus Steamboat, Gear West).
Which brands use which system
Brand choice largely locks you into a binding family, but only SNS is a dead end — every current major brand produces NNN-compatible bindings or soles.
| Brand | Binding system | Plate |
|---|---|---|
| Fischer | Turnamic | IFP |
| Rossignol | Turnamic | IFP |
| Salomon | ProLink (+ legacy SNS) | Shift-In (PSP) |
| Atomic | ProLink | Shift-In (PSP) |
| Madshus | Xcelerator (NNN) | NIS |
| Alpina, Alfa, Peltonen | NNN soles (boot makers) | — |
Sources: Gear West, SkatePro, Improve Winter.
Buying guidance
- Never mix SNS with the NNN family. An SNS boot will not fit an NNN, ProLink, or Turnamic binding, and an NNN-family boot will not fit an SNS binding. Match the boot sole to the binding first (Improve Winter).
- NNN-family boots and bindings are cross-compatible. Any NNN, ProLink, or Turnamic boot works in any NNN-family binding — so a Salomon ProLink boot on a Fischer Turnamic binding is a valid setup (Nordic Ski Coach).
- Match the plate to the binding. An IFP ski needs a Turnamic binding; a Shift-In ski needs a ProLink binding; an NIS ski takes an Xcelerator/NNN binding. The plate is pre-mounted at the factory and cannot be swapped (GearX).
- Legacy SNS gear is usable but a dead end. SNS boots and bindings still work fine and are common used, but no new SNS gear is being made — budget for eventually migrating to the NNN family (r/xcountryskiing).
- Backcountry is a separate system. NNN BC boots and bindings are beefier and incompatible with track NNN/SNS/Prolink/Turnamic gear — pick NNN BC only for off-track, heavier touring (GearX).
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