Overview
ISO 18106:2026 specifies standardized methods for measuring the snow grip performance of loaded new tyres for passenger cars, commercial vehicles, trucks, and buses. Developed by the International Organization for Standardization (ISO), this standard ensures that the measurement of the relative snow grip performance index is consistent and reliable for all tyre types when tested under loaded conditions on a snow-packed surface. With clear procedures for comparing a candidate tyre to a reference tyre using both braking and acceleration tests, ISO 18106:2026 supports manufacturers, testing bodies, and regulatory authorities in assessing tyre performance in winter driving conditions.
Key Topics
- Snow grip performance testing: Methods for evaluating a tyre's traction on snow by comparing it to a standard reference test tyre (SRTT).
- Types of tyres covered: Applies to new tyres intended for passenger cars, commercial vehicles, trucks, and buses.
- Test procedures:
- Braking on snow for passenger car and commercial vehicle tyres
- Acceleration on snow for truck and bus tyres
- Use of control tyres when direct comparison with reference tyres is not feasible
- Test conditions:
- Loaded tyres, replicating real-world use
- Flat, snow-packed surfaces with specific snow compaction and temperature ranges
- Use of calibrated instrumentation under winter testing conditions
- Statistical validation: Data analysis protocols, including mean, standard deviation, and coefficient of variation, to ensure accuracy and repeatability
Applications
ISO 18106:2026 is widely relevant to:
- Tyre manufacturers: Ensuring product performance complies with international snow grip requirements before market release.
- Automotive testing laboratories: Providing standardized test methods for evaluating snow grip, enabling consistent comparisons across products and brands.
- Regulatory bodies: Facilitating type approval, certification, and market surveillance for tyres intended for use in snowy or icy conditions.
- Transport companies and fleet operators: Informing purchasing decisions to optimize vehicle safety and operational efficiency in winter climates.
By following ISO 18106:2026, stakeholders can:
- Achieve objective, repeatable snow performance assessments.
- Improve end-user safety through accurate tyre labeling and consumer information.
- Support harmonization of regulations and testing across markets, reducing barriers to trade.
Related Standards
ISO 18106:2026 references and aligns with several important international tyre standards:
- ISO 4000-1: Passenger car tyres and rims
- ISO 4209-1: Truck and bus tyres and rims
- ASTM E1136-19: Reference tyre specifications for testing
- ASTM F1805-20: Method for measuring traction on snow- and ice-covered surfaces
- ASTM F2872-25, F2493-24, F3677-23, F3678-25: Standard reference test tyres for various vehicle types
For a comprehensive approach to tyre performance testing, users should also consider related publications on wet grip, rolling resistance, and overall tyre safety standards.
Practical Value
Implementing ISO 18106:2026 helps ensure that snow grip testing:
- Follows clear, internationally recognized methodologies
- Uses appropriate reference tyres for meaningful comparison
- Delivers reliable, reproducible data for product approval and market claims
This standard is an essential resource for anyone involved in tyre production, testing, and regulatory compliance related to winter or snow performance, supporting road safety and industry best practices across global markets.
