This is the only interactive ski edge troubleshooter online. Most guides assume you know the cause. This tool asks what HAPPENS on the snow, then tells you whether it is an edge, wax, base, or technique problem with the specific fix.
Why are my skis not gripping on ice? In 80% of cases: dull edges. Test: drag your fingernail across the edge at 45 degrees. A sharp edge catches your nail; a dull edge slides over it. Fix: sharpen with a diamond stone or file guide at 87 to 88 degrees. If edges are sharp but still sliding: wrong edge angle (too obtuse), base structure worn smooth, or technique issue (not enough edge angle in the turn). Select your symptom below for a specific diagnosis.
Step 1 · What is happening?
Pick a symptom above to see a diagnosis with specific fixes.
For reference only. If skis behave unpredictably after hand-tuning, take them to a shop for a machine tune. Bent or separated edges are not safely fixable at home.
The most common ski edge problem is no grip on ice (dull edges). The table below covers seven common edge and base symptoms with the typical cause, fix, time and cost.
Symptom
Most Likely Cause
Fix
Time
Cost
No grip on ice
Dull edges
Diamond stone or file tune
5 to 20 min
Free to 60 USD
Chattering in turns
Over-sharp edges or technique
Gummy stone + pressure technique
2 min
Free
Catching / hooking
Sharp contact points
Detune tip / tail
5 min
Free
Slow / sticky skis
Dry base, wrong wax
Hot wax
20 min
5 to 15 USD
Uneven turns
One ski duller or body asymmetry
Swap test, then sharpen
5 to 20 min
Free to 60 USD
Base damage
Gouges from rocks
P-Tex or shop repair
10 to 30 min
3 to 30 USD
Rusty edges
Moisture
Gummy stone
30 sec
5 to 10 USD
The Fingernail Test: 10-Second Edge Check
Drag your fingernail across the ski edge at a 45-degree angle. A sharp edge catches your nail; a dull edge lets it slide. Test underfoot (the most important area, where you actually carve). If the edge is dull anywhere under the binding, the ski will not hold on ice. Repeat every 3 to 5 days of skiing. This 10-second check is more reliable than any visual inspection and replaces guessing whether the edges need work.
Edge Angle by Ski Type
Racing skis run 86 to 87 degrees for maximum ice grip. All-mountain skis run 88 degrees as a balance of grip and forgiveness. Park skis run 89 to 90 degrees so they slide on rails instead of catching.
Ski Type
Side Edge
Base Edge
Detuning
Slalom racing
86 to 87°
0.5 to 1°
Minimal (3 cm tip)
GS racing
87°
1°
Minimal (3 to 5 cm)
Carving (piste)
87 to 88°
0.5 to 1°
Light (5 to 8 cm tip)
All-mountain
88°
0.5°
Moderate (8 to 10 cm tip)
Freeride / powder
88 to 89°
0 to 0.5°
Aggressive (10 to 15 cm)
Park / freestyle
89 to 90°
0°
Very aggressive (15 to 20 cm)
DIY Edge Tuning Kit: What You Need
A complete edge tuning kit costs 40 to 80 USD and pays for itself after 2 to 3 home tunes. Six items cover every routine tune.
Tool
What It Does
Cost
Side edge file guide (87 to 88°)
Sets consistent angle
15 to 30 USD
Diamond stone (fine)
Sharpens and polishes
15 to 25 USD
Base edge guide (0.5 to 1°)
Sets base bevel
10 to 20 USD
Gummy stone
Removes burrs, detuning
5 to 10 USD
File (fine, 8 to 10 inches)
Removes material faster than stone
5 to 15 USD
Edge marker (Sharpie)
Shows where material is removed
2 USD
Frequently asked questions
How do I know if my ski edges are sharp enough?
Fingernail test: drag your nail across the edge at 45 degrees. Sharp edge catches your nail. Dull edge lets it slide. Test underfoot (the most important area). If dull, sharpen with a diamond stone (5 minutes) or get a professional tune (30 to 60 USD).
How often should I tune my ski edges?
Diamond stone touch-up every 3 to 5 days of skiing (5 minutes, free). Full edge tune with file guide every 10 to 15 days or once per season (20 minutes at home, 30 to 60 USD at shop). After any rock contact: check for burrs immediately. After season end: full tune before summer storage.
What causes ski chattering?
Three main causes: (1) edges too sharp (recently tuned to 87° or less) causing grab-and-release on ice, fix by lightly detuning with gummy stone, (2) insufficient edge angle pressure in turns (technique: tip knees more into the turn), (3) ski too soft or too stiff for your speed and conditions.
Should I detune new skis?
Yes, the tip and tail contact points. Many new skis ship with sharp edges everywhere including the tip and tail, which causes catching. Detune the first 5 to 10 cm of the tip and last 3 to 5 cm of the tail with a gummy stone. Leave the effective edge (under the bindings) sharp. Also check if the factory set the edge angle to your preference (many ship at 90° and need sharpening to 88° for recreational skiing).