How long can tires sit in a garage?

It’s a common question for car owners – how long can tires that are in storage last before they become unsafe to use? There are a few key factors that determine the lifespan of stored tires.

Quick Answers

– Properly stored tires can generally last 5-6 years before needing to be replaced due to cracking and dry rot.

– Tires degrade over time even when not being used, due to the natural breakdown of rubber compounds.

– Heat, sunlight, and exposure to oxygen accelerate the aging process of tires in storage.

– Regularly inspect stored tires for cracking, flat spots, and other damage that can render them unsafe.

– Storing tires properly – cleaned, covered, and away from sunlight and excessive heat – can help maximize their usable life.

How Tire Aging Impacts Safety

The rubber compounds in tires are formulated to remain flexible and maintain grip throughout years of use. However, even when not being used, tires still slowly deteriorate just from exposure to oxygen in the atmosphere.

As tires sit idle, the antioxidant chemicals designed to protect the rubber break down over time. This causes the rubber to become brittle and inflexible through a process called “oxidative aging.” Tires that have aged excessively are prone to blowing out or suffering tread separation while driving at high speeds.

Aged tires also lose elasticity, which reduces their ability to grip the road effectively, especially on wet or slippery surfaces. The small cracks that develop in the rubber tread can allow air to leak out gradually, resulting in underinflation and poor vehicle handling.

Using old, weathered tires that are past their age limit severely compromises traction, ride quality, and vehicle safety in general. The older and more degraded tires become, the higher the risks of a tire failure incident.

How Storage Conditions Affect Tire Longevity

A tire’s usable lifespan is impacted significantly by the conditions it faces while in storage. Ideal storage conditions help maximize how long a tire can last before needing replacement.

Here are some of the factors that can accelerate aging when tires are in storage:

  • Exposure to heat – High temperatures cause rubber compounds to degrade faster.
  • Exposure to sunlight/UV rays – UV radiation breaks down the chemical bonds in rubber.
  • Exposure to oxygen – Oxygen causes the tread to dry out and oxidize.
  • Weight pressure – Storing tires upright sidewalls can deform them over time.
  • Petroleum contact – Gasoline and other chemicals cause rubber to swell and crack.
  • Ozone exposure – Ozone in the air hastens cracking from oxidation.

Conversely, these storage conditions help maximize tire life:

  • Cool, climate-controlled environment – Maintain temperatures under 85°F if possible.
  • Out of direct sunlight – Keep tires away from windows and UV sources.
  • Well-ventilated area – Allows oxygen to dissipate rather than collect.
  • Clean and dry surfaces – Reduce chemical and moisture damage.
  • Stored flat or horizontally – Eliminates pressure on sidewalls.
  • Free of petroleum sources – Avoid gasoline, oils, grease etc.

Average Lifespan of Stored Tires

Most tire manufacturers agree that the average expected lifespan for tires in storage is around 6 years from the production date, if stored properly.

However, heat and sunlight can accelerate aging to the point where tires may only last 2-3 years before cracking or drying out. Sitting upright also takes its toll on tire integrity over time.

Conversely, a tire that is fastidiously stored away from heat, moisture, and sunlight may last up to 10 years before needing replacement.

Here are some general guidelines for estimated usable life based on storage conditions:

Storage Conditions Expected Tire Lifespan
Ideal climate control 8-10 years
Clean, ventilated area 6-8 years
Garage or shed 4-6 years
Outdoors, moderate temperatures 2-4 years
Outdoors, hot climate 1-3 years

Remember that aging can be accelerated by factors like exposure to heat, sunlight, or petroleum. Visually inspect stored tires frequently for signs of deterioration.

Signs that Stored Tires Need Replacement

The most reliable way to identify tires that have aged to an unsafe degree is by closely inspecting them for these signs of degradation:

  • Surface cracking – Tiny fissures through the entire tire tread and sidewall.
  • Carbon spotting – Dark spots on the sidewall caused by oxidation.
  • Flat spots – Deformed areas from sitting too long in one spot.
  • Dry rotting – Rubber feels overly hard when squeezed.
  • Tread separation – Not glued properly or coming apart.
  • Ozone cracking – Jagged lines run sidewall to sidewall horizontally.

Any tires displaying these traits should be immediately removed from service and replaced. Cracks enable air leaks that could result in blowouts or underinflation. Flat spots lead to vibration and uneven tread wear.

Catching damage early allows worn tires to be replaced in a proactive manner before any failures occur while on the road.

Preparing Tires for Storage

Proper preparation before putting tires into storage helps maximize their longevity:

  • Wash thoroughly to remove dirt, salt, and grease from the rubber.
  • Allow tires to dry completely before storing to prevent moisture damage.
  • Apply tire balm or silicone spray to add a protective barrier.
  • Store away from sources of heat, sunlight, or chemical fumes.
  • Use wheel bags to shield tires from light and dust.
  • If possible, do not store upright – lie flat or stack sideways.
  • Ensure storage temperatures stay between 60-80°F.
  • Check pressure monthly and keep inflated to maximum PSI rating.

With proper maintenance and conditions, stored tires can often last quite a few years beyond the 5-year average before needing to be scrapped. But remember to check frequently for any signs of cracking, rot, or damage.

What to Do With Old Tires

Once tires are past their usable life, they should not just be thrown out with regular garbage or abandoned. Old tires need to be disposed of properly to avoid creating environmental hazards.

Here are some smart options for old tire removal and recycling:

  • Many local mechanics and tire shops accept old tires for recycling.
  • Look into tire collection programs through your city or county waste management.
  • Some retailers accept old tire drop-offs when purchasing new ones.
  • Use recycled rubber mulch for landscaping projects.
  • You may be able to donate to organizations that repurpose tires.
  • Hire a waste removal company to dispose of tires safely.

With scrap tires, the rule of thumb is “reduce, reuse, recycle.” Avoid stockpiling old tires on your property and contribute to a sustainable solution instead.

Key Takeaways on Stored Tire Longevity

  • With proper storage, tires can typically last 5-6 years before dry rotting or cracking.
  • Heat, sunlight, and oxygen exposure accelerate tire aging significantly.
  • Routinely check stored tires for signs of damage like fissures or flat spots.
  • Ideal conditions for maximizing lifespan are cool, clean, and out of the sun.
  • Prepare tires before storage by cleaning, drying, and applying protective sprays.
  • Replace tires immediately if cracks, rot, or separations are spotted.
  • Properly recycle or dispose of tires that are past their usable age.

Conclusion

With typical passenger car use, tires often wear out before aging renders them unsafe. But for stored tires not being used regularly, aging poses a significant safety concern.

Checking tires frequently, maintaining proper inflation, and storing in cool conditions can help maximize how long spare tires remain viable. Any that show cracking, flat spots, or damage should be immediately swapped out.

While most tires last around 6 years in storage, ideal storage conditions can extend lifespan closer to 10 years. Keep your unused tires clean and shielded to get the most out of their longevity.

Leave a Comment