Dominator Academy

Wet suction part 2: why water under the ski slows you down

When gliding on snow, water is both helper and opponent. A thin water film reduces friction; a water film that is too thick creates wet suction. In part 2, you will learn why water-film thickness decides between speed and braking.

Why water does not automatically make skis faster

When skiing, pressure and friction create a fine water film between ski base and snow. This film is fundamentally important because it reduces direct contact between base and snow crystals.

If the water film becomes too thick, however, its effect changes. The water no longer acts only as a glide medium; it creates additional resistance. The ski then feels sticky, sluggish or dull.

Water-film thickness is decisive

The central question with wet suction is: how much water is under the ski? An extremely thin film can reduce friction. A thick film, however, can create capillary forces and suction effects.

Thin water film

The ski glides more easily because there is less direct contact with the snow. This is the fast range.

Transition range

Small changes in temperature, moisture or structure can already make noticeable differences.

Thick water film

Water cannot escape quickly enough. The ski starts to stick and loses speed.

With wet suction, the problem is not “water” itself, but excess water that is not drained efficiently from the contact zone.

Capillary forces explained simply

When water is trapped between two surfaces that are close together, capillary forces can occur. These forces make it harder for the surfaces to separate.

A similar effect happens between ski base, water film and snow surface. The larger the wetted contact area and the worse the water drains away, the stronger the braking effect can become.

Why wet suction is especially noticeable in warm snow

Warm snow contains more free water. In addition, the snow surface is softer and can compact more strongly. This creates a larger contact zone between ski and snow.

On spring snow or wet artificial snow, the ski can therefore suddenly feel slower even though it has just been waxed. In such situations, pure wax quantity is often not decisive; water drainage, structure and base cleanliness are.

Spring snow

A lot of free water, dirt and a soft surface increase the risk of wet suction.

More about dirt in snow

Artificial snow

Dense, aggressive snow structures can brake dry or promote wet suction in moist conditions depending on temperature.

More about snow friction

The influence of speed

Speed also changes the water film. At higher speed, more heat is generated by friction, while water is displaced from the contact zone more quickly. At lower speed, water can stick more strongly.

That is why a ski can run well on a fast section and suddenly feel sticky on flat, moist parts. This is exactly where wet suction becomes especially clear.

Why racers notice wet suction immediately

In racing, not only top speed matters but also the ski’s ability to accelerate on flat sections. When wet suction occurs, the ski loses energy exactly where every meter counts.

Service teams therefore pay close attention to snow moisture, structure, wax tune and brushing finish. A well-prepared ski should drain water quickly without losing the necessary glide friction.

What you should take from part 2

Wet suction does not simply occur because of “wet snow”, but because of an unfavorable relationship between water film, contact area, structure and wax surface. The goal is not to avoid water completely, but to use the right amount in a controlled way.

In practice, this means: in moist conditions you need a clean structure, suitable Ski Wax and careful Ski Waxing in which excess wax is completely removed from the structure.

Next step: reduce wet suction

Part 3 is about the solution: how to reduce wet suction with base structure, suitable Ski Wax and clean preparation, and how to make your ski faster in wet snow.

Next article: Wet suction part 3