Tire chains and winter tires are often confused as alternatives. They aren't. They solve different problems and are appropriate in different situations.
Winter tires — daily driving
Winter tires are designed to be your daily-driver tire from late fall to early spring. You drive on them every day, in every condition: dry, wet, light snow, heavy snow, ice. They're a continuous solution that requires no setup beyond seasonal mounting.
Winter tires work because of the rubber compound and tread pattern — soft, sipe-heavy, designed for grip across the winter range of conditions.
Chains — emergency traction
Chains are not a daily-driving solution. They're emergency traction for specific conditions: deep snow, ice, or mountain passes where the road exceeds what any tire can handle. You put them on for the section of road that requires them, then take them off.
Chains work mechanically — metal links bite into snow and ice in a way no rubber can. On bare pavement, they wear themselves and the road quickly, and can't be driven above about 30 mph.
When you need chains
- Mountain pass closures that require chains for passage ("chain controls" in California, Colorado, Washington, etc.)
- Deep snow that exceeds even winter-tire capability
- Steep grades on packed snow or ice
- Driving on roads that aren't maintained in winter
When chains are the wrong tool
- Normal highway and street driving in winter — winter tires handle this far better
- Cars with low-clearance bodywork — chains may rub fender liners or brake lines
- AWD vehicles in moderate snow — generally won't need them at all
What about cable chains, snow socks, and other alternatives
Cable chains (wire mesh in a chain pattern) are easier to install and friendlier to bodywork than steel link chains, but they wear out faster and grip slightly less aggressively. Snow socks (fabric tire covers) are even easier to install and DOT-approved in many places — they're a useful occasional-use option for cars that can't fit chains.
The right combination
If you live in a mountain area or regularly drive over mountain passes, the right setup is winter tires for daily driving plus chains stowed for emergency or mandatory chain-control situations. Winter tires alone handle 95% of conditions. Chains handle the 5% they don't.
Chains are a tool. Winter tires are infrastructure.