How to Store Tires Properly
Short answer: clean them, bag them, keep them cool, dark and dry. Loose tires stand up or stack no more than four high; tires on rims stack flat or hang. What kills rubber in storage is sunlight, heat and ozone — not time on a shelf.
The Five Steps
- Wash off the salt. Water and mild soap, then dry them fully. Toronto road salt sitting on rubber and alloy for six months does real damage — this step matters more here than almost anywhere.
- Label each one. “FL”, “FR”, “RL”, “RR” in chalk or on a sticker. Next season you can rotate them properly instead of guessing.
- Bag them individually. Opaque, airtight, air pressed out. This slows the evaporation of the oils that keep rubber flexible. Large garbage bags work fine.
- Pick the right spot. Cool, dark, dry. A basement is ideal. Not a balcony, not a garden shed, not anywhere the sun reaches.
- Position them correctly. Loose tires: upright, or stacked no more than four high. Mounted on rims: stack flat or hang them — standing a mounted wheel on its tread for six months flat-spots it.
The Three Real Enemies
- UV light. Sunlight breaks down the compound and cracks sidewalls. This is the biggest one, and it’s why balcony storage is the worst common choice.
- Heat. An attic or an unventilated shed in a Toronto July hits temperatures that age rubber fast.
- Ozone. Electric motors — furnaces, generators, some sump pumps — produce ozone, which attacks rubber. Keep tires a few metres away from them.
Things People Get Wrong
- Leaving them outside “just under a tarp”. A tarp traps moisture and does nothing about heat.
- Dressing them with tire shine before storage. Petroleum-based dressings can draw out the protective compounds. Store them clean and bare.
- Deflating them. Leave mounted tires at normal pressure, or slightly lower. Fully deflating lets the bead unseat.
- Storing them on their tread on concrete. Flat spots on a mounted set are a real thing and they take a while to shake out in spring.
Or Just Don’t
Most people in Toronto don’t have a cool dark basement to spare, which is the honest reason a lot of drivers skip winter tires entirely. We store a set for $99 a season — washed, bagged, plate-tagged, racked off the ground, tread logged at drop-off and again at pickup, and pulled and waiting in the bay the morning of your changeover.