Winter tires are built for snow, ice, and temperatures below 45°F (7°C): their rubber stays flexible in the cold, and their deeper tread and extra sipes grip snow and ice. All-season tires are built for dry and wet roads and light snow in mild winters; their rubber stiffens below 45°F. If your winters bring regular snow, ice, or temperatures below 45°F, get winter tires. If snow is light and occasional, all-season tires are enough.
What Makes All-Season and Winter Tires Different?
All-season and winter tires differ in rubber compound, tread design, sidewall marking, and tread life:
| All-Season Tires | Winter Tires |
|---|---|---|
Rubber compound | Stiffens below 45°F (7°C) | Stays flexible in freezing temperatures |
Tread | Shallower, less aggressive grooves; fewer sipes | Deeper, more aggressive grooves; many more sipes and biting edges |
Sidewall marking | Usually M+S | Three-Peak Mountain Snowflake (3PMSF), often with M+S |
Best for | Dry and wet roads, light snow, mild winters | Packed snow, ice, and temperatures below 45°F |
Tread life | Year-round use | Wear faster; remove them after winter |
Consumer Reports’ tests show winter tires grip better than all-season tires when starting in snow and stopping on ice. The trade-off is wear: winter tires wear faster, and Consumer Reports notes they can last three or four seasons if you remove them after each winter. See our best tested winter tires.
All-weather tires sit between the two; see all-season vs all-weather tires for that comparison.
Specific Markings Found on All-Season and Winter Tires
All-season tires usually carry the M+S (Mud + Snow) marking, and winter tires carry the Three-Peak Mountain Snowflake (3PMSF) symbol. Only the 3PMSF symbol confirms tested snow traction.
- M+S: given to tires whose tread has at least 25% open space (grooves and notches). There is no performance test behind it, so it doesn’t certify grip in snow or mud.
- 3PMSF: the tire passed a standardized snow traction test (ASTM F1805) on medium-packed snow, with a traction index of at least 110 against the standard reference test tire. The test measures snow traction, not ice.
Many winter tires carry both symbols. When you compare tires for winter, look for the 3PMSF symbol.
Tread Particularities of Winter vs. All-Season Tires
Winter and all-season tires differ in three tread features: the rubber compound, the tread pattern and depth, and the number of biting edges.
Tread Compounds
Winter tire rubber stays flexible in freezing temperatures, so it keeps gripping snow and ice. All-season rubber stiffens below 45°F (7°C): the tread no longer conforms to the road surface, and grip drops. Switch to winter tires when temperatures drop below 45°F, not at the first snowfall.
Tread Patterns and Depth
Winter tires have a deeper, more aggressive tread to grip snow. All-season tires have channels and grooves too, but they are shallower and less aggressive.
Biting Edges
Winter tires have many more sipes (thin slits in the tread blocks) and biting edges than all-season tires, which add grip on snow and ice. The Bridgestone Blizzak LM-32 is an example: its silica tread compound and Lamellen sipes add biting edges for snow and ice, and it carries the 3PMSF symbol.
All-Season VS Studless/Studded Winter Tires
Studless and studded tires are both winter tires; all-season tires are not. All-season tires handle mild winters, while studless and studded tires are made for severe winter conditions.
What Are Studless Tires?
Studless tires are winter tires without metal studs. They grip snow and ice with a rubber compound that stays flexible in the cold and a tread that bites into snow and channels it away. Studless tires aren’t subject to the legal restrictions on studded tires.
What Are Studded Tires?
Studded tires are winter tires with small metal or tungsten studs in the tread that bite into packed snow and solid ice. Studdable tires are winter tires made to take studs: you add or remove the studs depending on how harsh the winter is.
Studded or Studless Tires?
Choose studded tires if you often drive on ice and hard-packed snow, and studless tires for other winter roads; then check your state’s stud laws. On dry or wet pavement, studs are noisy and wear the road surface, which is why many states restrict them.
Some states prohibit studded tires by law. Others regulate their use according to specific weather conditions, and some allow studs only in certain months of the year. The last category includes the states that allow only rubber studs, which are gentler on the road surface than metal ones.
Winter or All-Season Tires: Which Should You Get?
Get winter tires if your winters bring regular snow, ice, or temperatures below 45°F (7°C): choose studless winter tires for most winter roads, and studded tires for frequent ice and hard-packed snow where your state allows them. Get all-season tires if your winters are mild, with light, occasional snow. Shop winter tires and all-season tires at NeoTires: orders get same-day dispatch and arrive in 2–3 business days across the U.S., and tires labeled Free Shipping ship free.
Sources
- USTMA: Definition for Tires for Use in Severe Snow Conditions: 3PMSF, ASTM F1805, index of at least 110
- Consumer Reports: Winter/Snow vs All-Season Tires: winter tires grip better to start in snow and stop on ice; wear faster
- Tire Review: When to Change Over to Winter Tires: all-season compounds stiffen below 45°F
- Firestone: Studded vs. Studless Snow Tires: studless and studded definitions, noise, road damage, laws
- NeoTires product page, Bridgestone Blizzak LM-32: silica compound, Lamellen sipes, 3PMSF
