If your region sees real winters and real summers, two sets of tires are not an enthusiast hobby—they are a safety tool. This guide covers timing, storage, and the PSI surprises that follow every cold snap.
When to mount winter tires
Switch before sustained night temperatures linger near freezing—not after the first ice storm fills every shop in town. Winter compounds need cold to grip; they also wear quickly on warm fall asphalt, so do not mount them in August “just to be ready.”
When to switch back
When overnight lows reliably stay well above freezing and roads are clear of freeze-thaw cycles, move to all-season or summer tires. Soft winter rubber on hot pavement feathers the tread and wastes money.
Storage that does not ruin the set
- Clean off brake dust and road film before racking.
- Keep tires out of direct sun and standing water.
- If stacked, do not crush sidewalls under heavy junk.
- Label each tire with position if you care about rotation history.
Rimline storage includes tags with your name and plate so spring retrieval is boring—in a good way.
Book changeovers early. Peak frost weeks are a queue, not a surprise.
Pressure and temperature
Roughly speaking, PSI drops about one pound for every 10°F cold swing. A car that was perfect on a warm afternoon can look “low” on a freezing morning without a leak. Set pressures cold to the door placard. Do not inflate to the sidewall maximum—that number is not your daily target.
Checklist for swap day
- Reserve a bay (storage intake optional).
- Note any TPMS lights or recent vibrations.
- Bring locking lug keys if equipped.
- Ask for a quick tread/age check on the set coming off.
- Confirm torque and cold PSI on the set going on.