Winter driving tire tips

How do tires behave in winter?

Tire rubber hardens significantly below 7°C (45°F), reducing grip even on dry roads. Winter tires use a softer compound and a different tread design (more sipes, deeper grooves) to maintain flexibility and channel slush. A summer tire at -5°C can take 30–40% longer to stop than a winter tire. Key winter tire actions: switch to winter tires before 7°C, check cold pressure (it drops ~0.1 bar per 10°C drop), clear tread of packed snow before driving, and know your local chain/snow-sock regulations.

Why 7 °C / 45 °F is the switch threshold

The rubber compound in a summer tire is formulated to stay flexible above approximately 7 °C. Below this temperature, it becomes progressively stiffer, reducing the tread blocks' ability to deform and grip micro-textures in the road surface. Winter tire compounds include silica and special oils that maintain flexibility at temperatures as low as -40 °C.

The 7 °C rule applies even on dry roads — a hard-compound summer tire has significantly less grip than a winter tire at 0 °C on dry tarmac, not just on snow.

Winter vs all-season vs summer — performance comparison

Feature	Winter	All-season	Summer
Compound temperature threshold	Optimised below 7 °C / 45 °F	Compromise — usable at all temps	Optimised above 7 °C; hardens in cold
Sipes (fine cuts in tread blocks)	High density — 1,000+ sipes per tire	Moderate	Few or none
Tread depth (new)	8–10 mm typical	8–9 mm typical	7–8 mm typical
Wet braking (0 °C, 100→0 km/h)	~35–40 m	~42–50 m	~55–70 m
Snow braking (0 °C, 50→0 km/h)	~23–28 m (3PMSF certified)	~28–35 m (M+S or 3PMSF)	~45–60 m
Dry braking (20 °C, 100→0 km/h)	~38–44 m	~36–42 m	~34–38 m
Legal in alpine zones (winter regulations)	Yes (3PMSF required in Austria, parts of DE)	Only if 3PMSF marked	No

Braking distances above are typical ADAC/TCS independent test data ranges — exact results vary by tire brand, vehicle weight, and speed. See our Seasonal tire guide for the full season comparison guide.

Cold pressure: how much does it drop?

Tire pressure drops approximately 0.1 bar (1.5 PSI) per 10 °C decrease in temperature. This means:

A tire set to 2.4 bar in a warm garage (20 °C) will read approximately 2.0 bar on a -20 °C morning (-40 °C delta ÷ 10 × 0.1 = -0.4 bar).
Always check pressure cold in winter — many drivers find their pressures 0.2–0.4 bar low every morning.
Do not set pressure after a run — the heat from driving temporarily inflates the reading. Check cold, after at least 3 hours at rest.

Some manufacturers recommend increasing the target pressure by 0.1 bar in winter to pre-compensate for cold drops. Check your owner's manual.

For cold-start service questions beyond tires, Oil Manual has manual-first oil viscosity guidance to help check the grade and OEM approval before winter.

Snow chains, socks, and studded tires

Snow chains

Traditional metal chains offer the best traction in deep snow and ice. They must be fitted to the driven wheels. Maximum speed with chains: 50 km/h. Remove as soon as roads are clear — chains damage dry tarmac and the chain itself wears rapidly above their rated speed.

Snow socks (textile covers)

Fabric over-tyre covers (AutoSock, ISSE, etc.) are lighter and easier to fit than metal chains. They are accepted as a chains alternative in some countries (France, Switzerland, some Spanish regions). Maximum speed: 50 km/h. Shorter life than metal chains.

Studded tires

Metal studs protrude from the tread to grip ice. Highly effective on ice and hard snow. Prohibited or restricted in most of continental Europe (not permitted in DE, AT, CH, FR, IT, ES, NL, BE). Legal in Scandinavia and Finland within defined seasons. Noisy and increase tarmac wear; must be fitted to all four wheels.

Country-by-country winter tire and chain rules

Country	Rule	When
Austria (AT)	Winter tires OR chains mandatory when snow/ice; 3PMSF required on motorways	Nov–Apr on many alpine roads; conditions-based elsewhere
Germany (DE)	Winter tires required in winter road conditions (not date-based)	Situational — snow, ice, black ice, slush; M+S minimum, 3PMSF from 2024
France (FR)	Loi Montagne 2: winter tires or carry chains in 34 departments	Nov 1 – Mar 31 in specified mountain departments
Switzerland (CH)	Winter tires recommended; chains required if posted	When snow chains signs are displayed
Italy (IT)	Winter tires or chains mandatory in many regions Nov–Apr	Varies by region; most alpine regions Nov 15 – Apr 15
Spain (ES)	Chains required on designated mountain roads when posted	When DGT signs display mandatory chain zones
Scandinavia (SE/NO/FI)	Winter tires mandatory (studded permitted in season)	Dec 1 – Mar 31 in SE; conditions-based in NO; Oct–Apr general in FI

Rules change annually — verify current regulations with local transport authorities before travelling.

Driving technique on snow and ice

Accelerate slowly — wheelspin on ice/snow digs in and reduces forward motion. On a manual, use a higher gear (2nd or 3rd) from standstill.
Brake early and gently — ABS prevents wheel lock on snow but still requires distance. Leave 3–10× the dry-road following distance.
Steer smoothly — abrupt steering inputs on slippery surfaces can cause the car to understeer (push wide) or oversteer (spin).
Look further ahead — anticipate bends, junctions, and pedestrian crossings earlier and slow down before you reach them.
If you start to slide — steer in the direction you want to go, ease off the accelerator, do not stamp the brakes (unless ABS; then brake firmly and steer).
Downhill in ice — use engine braking (lower gears), brake intermittently with gentle pressure, and maintain larger safety margins.

Winter tire prep checklist

Check tread depth — winter tires lose effectiveness below 4 mm (snow) or 3 mm (ice).
Check cold pressure and inflate to manufacturer spec.
Inspect sidewalls for cracks — winter compounds can crack if stored improperly.
Check DOT date — tires over 8 years old should be replaced even if tread looks acceptable.
Confirm 3PMSF marking if travelling to mandatory-alpine-tyre zones.
Carry chains or snow socks if travelling to regions where they may be required.

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Last reviewed: 2026-07-01