How to Tune the Edges on a Snowboard and Skis

Why Edge Tuning Matters

Your edges are the only thing between you and the snow when you're carving a turn. Sharp, properly angled edges bite into hardpack and ice, giving you control and confidence. Dull or burred edges wash out, slip, and make riding on anything firmer than fresh powder feel sketchy.

Edge tuning is one of the most impactful maintenance tasks you can do — and one of the most overlooked. Most riders wax regularly but never touch their edges. If you've been sliding out on groomed runs or struggling to hold a carve on icy mornings, dull edges are likely the culprit.

Understanding Edge Angles

Before you start filing, you need to understand edge angles. Your edges have two surfaces that matter:

  • Side edge (bevel angle): The vertical face of the edge, running along the side of the board or ski. This is the primary cutting surface. Most snowboards come from the factory with a 90-degree side edge (no bevel), though many riders prefer 88–89 degrees for a sharper, more aggressive bite.
  • Base edge (bevel angle): The bottom face of the edge, where it meets the base. A small base bevel (0.5–1 degree) prevents the edge from catching on flat terrain. Most boards come with 0.5–1 degree from the factory.

For most recreational riders, maintaining the factory angles is the right approach. Don't change your bevel angles unless you know what you're doing — too much side bevel makes the edge fragile; too little base bevel causes edge catch.

What You'll Need

  • A side edge tuner or file guide — holds the file at a consistent angle so you don't accidentally change your bevel
  • A steel file — for removing burrs and resharpening dull edges
  • Diamond stones (coarse, medium, fine) — for polishing the edge after filing
  • A gummy stone — for detuning the tip and tail (more on this below)
  • A metal scraper or base edge guide — for base edge work
  • A permanent marker (optional) — to mark the edge so you can see where you've worked

The Demon Elite X Edge Tuner Care Kit includes a side edge multi-tool, three diamond stones (coarse, medium, fine), a steel file, and a gummy stone — everything you need for a complete edge tune. The Demon DS8008 Basic Side Edge Tuner is a great entry-level option if you're just getting started.

Step 1: Secure Your Board or Skis

You need both hands free to tune edges properly. Use a vise or tuning stand to hold the board base-up and stable. Trying to tune edges with the board propped against a wall is a good way to get inconsistent results and cut yourself.

If you don't have a vise, the Demon Sasquatch Total Package includes a vise along with a full tuning kit.

Step 2: Inspect the Edges

Run your thumbnail lightly along the edge. A sharp edge will catch your nail cleanly. A dull edge will slide over it without catching. Look for:

  • Burrs: Small raised metal bits caused by rock strikes. They feel rough and jagged. Burrs need to be filed off before polishing.
  • Rust: Surface rust is common and easy to remove with a diamond stone. Deep pitting from rust may require more aggressive filing.
  • Flat spots: Areas where the edge has been worn down unevenly. These need extra attention with the file.

Optional: Run a permanent marker along the edge before you start. As you file, the marker will wear away where you're making contact, showing you exactly where you're working and where you're missing.

Step 3: File the Side Edge

Attach your file to the side edge tuner at your desired angle (typically 90 degrees for most snowboards, 88–89 degrees for a more aggressive tune). Place the guide against the side of the board and push the file along the edge in smooth, even strokes from tip to tail.

  • Use consistent pressure — don't press harder in some spots than others
  • Always file in one direction (tip to tail), not back and forth
  • Overlap your strokes slightly to avoid leaving gaps
  • Check your progress with the marker method — you should see even wear across the full edge

For badly damaged or very dull edges, start with a coarser file and finish with a finer one. For maintenance tuning on edges that are just slightly dull, a medium file is usually sufficient.

Step 4: Polish with Diamond Stones

After filing, the edge will be sharp but rough. Diamond stones polish the edge to a smooth, consistent finish that holds its sharpness longer and glides more cleanly through the snow.

Work through the stones in order: coarse → medium → fine. Use the same tip-to-tail stroke as the file, with light, even pressure. The edge should feel progressively smoother and sharper with each stone.

Finish with the fine stone until the edge has a bright, polished appearance and catches your nail cleanly along its full length.

Step 5: Detune the Tip and Tail

This step surprises a lot of beginners, but it's important: you don't want sharp edges all the way to the very tip and tail of the board. Sharp edges at the contact points cause edge catch — the board grabs unexpectedly and throws you off balance.

Use a gummy stone to lightly dull the edges in the first 5–10cm of the tip and tail. A few light passes is all it takes. You're not removing material — just taking the sharpness off so the edge releases smoothly rather than grabbing.

Note for carvers and racers: Some aggressive carvers prefer sharp edges all the way to the contact points for maximum grip. If that's your style, skip this step — but be aware that edge catch becomes more likely.

Step 6: Check the Base Edge (Advanced)

Base edge work is more advanced and less frequently needed than side edge tuning. If your board is new or was recently shop-tuned, the base edge is likely fine. If you're experiencing edge catch on flat terrain or the board feels "hooky," the base edge may need attention.

Base edge work requires a base edge guide and a file or diamond stone. If you're not confident doing this yourself, have a shop handle it — removing too much base edge bevel is difficult to reverse.

How Often Should You Tune Your Edges?

  • Every 3–5 days of riding for regular maintenance with a diamond stone
  • After any rock strike or significant impact — check for burrs and file if needed
  • At the start of each season — a full file and polish before your first day
  • When you notice reduced grip on hardpack or ice — the clearest sign your edges need attention

Skis vs. Snowboards: Any Difference?

The process is essentially the same for both. The main practical difference is that skis have two separate edges to tune (one per ski), and the narrower width of a ski edge requires slightly more care to keep the file guide seated properly. Take your time and use the marker method to confirm even coverage.

Shop Edge Tuning Tools at Demon United

Complete your tune with base repair and waxing: