DIN Ski Bindings
Water & Snow · 10 specs
Direct Answer
Alpine ski binding release settings are regulated internationally under ISO 11088 (which codifies the German DIN standard Deutsches Institut für Normung). The DIN release value (typically ranging from 1 to 18 on a calibrated mechanical spring scale) determines the exact torque threshold (in Newton-metres) at which the toe piece releases laterally (20–110+ Nm) or the heel piece releases vertically (60–450+ Nm) to prevent tibia fractures and ACL tears. Settings are computed based on skier weight, height, age, skier type (I, II, III), and Boot Sole Length (BSL in mm).
Source: ISO 11088 (Assembly, adjustment and inspection of an alpine ski-binding-boot system) / DIN 7881 · Last reviewed Aug 28, 2026
Specs
| Governing International Standard | ISO 11088 / ASTM F939 Binding Release and Inspection Standard |
| Junior DIN Range | 0.75–4.5 DIN scale (children and light juniors under 45 kg) |
| Recreational Adult DIN Range | 3.0–10.0 / 4.0–12.0 DIN scale (standard adult all-mountain bindings) |
| Expert / Freeride DIN Range | 6.0–16.0 / 8.0–18.0 DIN scale (aggressive freeride and racing) |
| World Cup Race DIN Range | 14.0–24.0+ DIN scale (heavy metal race plates) |
| Lateral Toe Release Torque (DIN 6) | 58.0 Nm (Newton-metres torque) |
| Vertical Heel Release Torque (DIN 6) | 229.0 Nm (Newton-metres torque) |
| Skier Type I (Cautious / Beginner) | Skier Code minus 1 row Low release torque for soft falls |
| Skier Type II (Moderate / Intermediate) | Standard Skier Code row Balanced all-mountain release |
| Skier Type III (Aggressive / Expert) | Skier Code plus 1 row High retention to prevent pre-release |
ISO 11088 5-Factor DIN Calculation Matrix
- 5-Factor Calibration Protocol: Certified ski technicians compute the DIN number using five exact parameters: (1) Skier Weight (kg/lbs), (2) Skier Height (cm/in), (3) Skier Age (skiers <9 or ≥50 move down one row), (4) Skier Type (I, II, III), and (5) Boot Sole Length in mm. The intersection on the ISO 11088 chart defines the exact spring setting for toe and heel.
- Boot Sole Length Leverage Physics: A longer boot sole acts as a longer physical lever arm across the binding; therefore, as BSL increases (e.g. from 270 mm to 330 mm), the required DIN spring number automatically decreases to achieve the exact same torque release threshold.