Which tyres are compatible with the Montagne Law? (Complete 2025 Guide)
Since the entry into force of the Montagne II Law, winter equipment is compulsory in many French communes between the 1st November and the 31 March. This practical guide clearly explains which tyres conforms (3PMSF, 4-season, winter), which is no longer the case (M+S only), alternatives (chains/socks), penalties, and our advice for choosing correctly according to your profile and usage.
Montagne Law: History and Objectives
The Montagne II Law aims to reduce accidents and blockages linked to snow and ice on mountain routes. The equipment requirement applies every year from 1st November Au 31 March, as per prefectural orders.
Affected Zones & Panels
34 departments are affected: Alps, Pyrenees, Massif Central, Jura, Vosges. Entry and exit from the zone are marked by signs B58 and B59 (output). Always check the Local bye-laws if you cross several departments.
Legal obligations 2025
- 4 winter tyres Or 4 all-season tyres with 3PMSF marking Mountain and snowflake pictogram.
- OU Snow chains / socks available on board for at least 2-wheel drive.
- Since November 2024, the marking Mud and Snow Alone is no longer accepted as proof of compliance.
Compatible tyre types (3PMSF)
- 3PMSF winter tyres Deep sipes, optimised rubber < 7°C, superior grip on snow and ice.
- All-season tyres 3PMSF Compromise summer/winter, ideal if you go to the mountains occasionally.
Comparison table (winter vs. all-season)
| Criterion | 3PMSF winter tyre | 4-season tyre 3PMSF |
|---|---|---|
| Compact snow | ★★★★★ | ★★★★☆ |
| Verglas | ★★★★★ | ★★★☆☆ |
| Cold rain | ★★★★★ | ★★★★☆ |
| Noise/Comfort | ★★★★☆ | ★★★★★ |
| Annual versatility | ★★★☆☆ | ★★★★★ |
M+S vs 3PMSF: what's the difference?
Mud and Snow is a marking declarative from the manufacturer. Conversely, the 3PMSF (Three Peak Mountain Snow Flake) validates standardised tests of performance in winter conditions. It is the only Marking recognised by current regulations.
Chains & socks: legal alternatives
- Valid if 3PMSF tyres are not available.
- Chains Maximum efficiency on heavy snow, more technical installation.
- Socks Quick setup, occasional use, faster wear.
Put them up on the drive wheels (and on the steering axle if recommended by the manufacturer). On a gradient, Lay the chain flat and advance slightly to finalise the closure.
Sanctions & assurances
- Fixed penalty 135 € (4th class).
- Immobilisation Vehicle possible in case of risk.
- Assurance A non-compliance can worsen your liability in the event of an accident.
Which tyre for your profile?
- Resident in a mountainous area
- 3PMSF winter tyres recommended, fitted four-wheel drive.
- Occasional user
- All-season tyres 3PMSF + set of chains/socks in the boot.
- Professional (utility, LCV)
- Dedicated equipment, regular checking of loads and pressures.
Maintenance, wear and storage
- Pressure: check every month and before a long journey.
- Sculpture depth: 4 mm recommended in winter (1.6 mm legal).
- Front/rear tyre rotation every 8,000–10,000 km to even out wear.
- Storage: dry, protected from light and ozone (motors, transformers).
Ecological impact & innovations
All-season tyres reduce seasonal replacements. Technologies (low-resistance compounds, evolving sipes, pressure/temperature sensors) improve safety and durability.
Comparison with abroad
Several countries (Germany, Austria, Italy) require winter tyres/equipment during similar periods and conditions. French regulations are progressively aligning with these beneficial winter practices.
Ready for winter?
➤ Find 3PMSF winter tyres
➤ See 3PMSF all-season tyres
➤ Buy snow chains or snow socks
Always climb 4 matching tyres (dimension, index, model) and comply with your vehicle's approved dimensions.
FAQ – The Mountain Law & tyres
Are M+S tyres sufficient?
No. Since November 2024, only the 3PMSF marking attests regulatory compliance.
Do all four wheels need to be equipped?
Yes, to ensure grip and stability, all 4 wheels must be fitted with compliant and identical tyres.
Are SUVs/4x4s exempt?
No. All private and light commercial vehicles are subject to the same obligations.
Can snow chains replace tyres?
Yes, provided we can faster on at least two driven wheels when conditions require it.
Checklist: check your compliance with the «Montagne Law»
- Control the 3PMSF marking on your tyres (snowflake + mountain).
- Measure the depth (visible ≥ 4 mm in winter).
- Take away this Pair of chains/socks Compatible dimension.
- Note the period of application 1 January to 31 March On your calendar.
- Before departure: tyre pressure, valve status, warning triangle, life jacket, scraper.
Conclusion
To drive serenely in mountainous areas, equip your vehicle with 3PMSF tyres (winter or 4 seasons) and keep some chains/socks in the boot. You will limit risks, comply with the Loi Montagne and protect your passengers.
