Choosing Winter Tires for Heavy-Duty Trucks: A North Dakota Fleet Checklist
October 20, 2026 - 8:52:17 am
Quick Summary: The best winter tires for heavy-duty trucks carry the three-peak mountain snowflake (3PMSF) symbol, have deep lugs on the drive axle, and go on before overnight lows stay under 45°F. Check tread depth well beyond the legal minimums, set pressure for the cold, and carry chains where state rules require them.
What Makes Winter Tires for Heavy-Duty Trucks Different?
When winter temperatures in North Dakota and western Minnesota drop to -20°F, tire rubber stiffens, air pressure falls, and stopping distance grows. A 3PMSF tire is one that meets severe snow service requirements and carries the three-peak mountain snowflake symbol, which marks it for enhanced winter traction. The symbol is commonly found on commercial drive tires, so it is the first thing to look for when you shop for winter drive tires.
Drive tires matter most. They have a significant impact on stopping distance, and a deep lug design is generally preferred over a multi-rib tread pattern when snow and ice are the main concern. Rib tires still make sense for steer positions and dry highway miles, so most fleets run a mix by axle position rather than one pattern everywhere.
All-Season, Winter, Studded, or Chains: Which Option Fits Your Truck?
Each option solves a different winter problem. The table below compares the four choices fleets weigh most often.
| Option | Best For | Watch Out For |
|---|---|---|
| All-season tires | Mild winters and temperatures above about 45°F | Traction and stopping distance fall off as temperatures drop and snow builds |
| Winter / 3PMSF tires | Cold-weather operation below about 45°F, snow, and slush | Wear faster if left on through warm weather, so plan the changeover |
| Studded tires | Ice and hard-packed snow | Banned or restricted in many states, so check the rules on your route |
| Tire chains | Deep snow and mountain or severe conditions where required | Rules vary by state, and speed is limited to about 30 to 35 mph with chains on |
For most ND and MN fleets, the practical setup is a 3PMSF drive tire as the base, with chains carried for routes that require them.
How to Choose Winter Tires for Heavy-Duty Trucks: A Step-by-Step Checklist
Step 1: Measure Tread Depth Against Winter Standards
The legal minimums are 4/32 inch on steer tires and 2/32 inch on drive, trailer, and dolly tires. Many fleet guides treat those as too thin for winter and recommend about 6/32 inch or deeper on steer tires and 4/32 inch or deeper on drive and trailer tires. Measure in two places, about 180 degrees apart, because wear is rarely even.
Step 2: Pick the Right Tread for Each Axle Position
Put the 3PMSF-rated, deep-lug tire on the drive axle. Keep steer tires in good condition with more tread than the legal minimum. Check alignment too, since a misaligned truck or trailer causes uneven wear on both steer and drive tires.
Step 3: Match Your Duals
Dual tires should match in tread depth, size, and inflation. A mismatched dual forces one tire to carry more of the load and wears out sooner.
Step 4: Set Pressure for the Cold
Tire pressure drops about 1 PSI for every 10°F drop in temperature. A tire set at 100 PSI at 70°F will be near 95 PSI at 20°F and near 91 PSI at -20°F, with no leak at all. Base your pressure on the manufacturer's load and inflation tables for the worst-case load, check pressure at every pre-trip during extreme cold, and calibrate your gauges at least weekly.
Step 5: Decide Your Chain Plan
Chains come as conventional steel link chains, cable chains, and automatic traction devices. V-bar crosslinks give more starting, stopping, and cornering traction than straight crosslinks, and ladder-style link chains generally outperform cable chains in deep snow. Install chains as tight as you can by hand, then stop and retighten after about a quarter mile. State rules differ, so verify them before dispatching a truck.
Step 6: Time the Changeover
A common fleet rule is to switch to winter tires in October, once overnight temperatures stay under about 45°F, and switch back in March or April, once they stay above it.
Winter Tire Planning for ND and MN Fleets
Ag haulers, oilfield trucks, and construction fleets in the region run through long winters, often on rural roads that are plowed last. A tire problem at -20°F is more than an inconvenience. Roadside tire calls average more than two and a half hours, so repairs made before winter are far cheaper than repairs made on the shoulder.
Winter tires are one part of a cold-weather plan. Gelled fuel, frozen air brakes, and weak batteries cause just as many breakdowns, so schedule a full pre-winter inspection. Wallwork's truck repair and service teams handle service and repair at locations across North Dakota and western Minnesota, and the parts department stocks genuine Kenworth parts. Contact your nearest location to ask which tire services are available.
Frequently Asked Questions
What does the 3PMSF symbol mean on truck tires?
The three-peak mountain snowflake symbol means the tire meets severe snow service requirements. It is commonly found on commercial drive tires and signals enhanced winter traction.
What is the minimum tread depth for truck tires in winter?
The legal minimums are 4/32 inch for steer tires and 2/32 inch for drive and trailer tires. For winter, many fleet guides recommend about 6/32 inch or more on steer tires and 4/32 inch or more on drive and trailer tires.
How much air pressure do truck tires lose in cold weather?
Tires lose about 1 PSI for every 10°F drop in temperature. In North Dakota winters, that can mean a drop of 9 PSI or more from a tire set at 70°F, so check pressure at every pre-trip in extreme cold.
When should fleets switch to winter tires?
A common rule is to switch in October, once overnight temperatures stay below about 45°F, and switch back in March or April once they stay above it.
Get Your Truck Ready for the Winter Ahead
Choosing winter tires for heavy-duty trucks comes down to the right tread on each axle, enough depth to last the season, correct pressure for the cold, and a chain plan for the routes that need one. If you are also planning a unit replacement, browse the current truck and trailer inventory, or contact Wallwork Truck Center to talk through winter service for your fleet.