Spare tires typically last between 6 and 10 years from the date of manufacture, but their usable life depends heavily on the type of spare and how it is stored. A full-size spare can be driven for thousands of miles, while a compact donut spare is only designed for 50 to 70 miles at speeds under 50 mph. Regardless of type, all spare tires degrade over time due to rubber aging, so checking the manufacturing date and condition is essential for safety.
Full-Size Spare Tires: Long-Term Durability
Full-size spares are identical to your regular tires and can last up to 50,000 miles if properly maintained. However, they still age out after about 6 to 10 years, even if never used. Rotate the full-size spare into your regular tire rotation schedule to ensure even wear and maximize its lifespan. Keep it inflated to the vehicle manufacturer’s recommended pressure, typically 30-35 PSI, and inspect for dry rot or cracking annually. If the spare is older than 10 years, replace it regardless of tread depth.
Compact Donut Spare Tires: Short-Term Emergency Use
Donut spares (temporary spare tires) are not built for long-distance driving. They have a tread life of only about 3,000 miles, but manufacturers strictly limit their use to 50-70 miles at a maximum speed of 50 mph. The rubber in donut spares degrades faster due to their smaller size and higher inflation pressure (around 60 PSI). Replace a donut spare if it is more than 6-8 years old, even if it looks fine. Never drive on a donut spare beyond the recommended distance, as handling and braking are severely compromised.
Factors That Shorten Spare Tire Life
Heat, sunlight, and improper storage accelerate rubber degradation. Spares stored in a hot trunk or exposed to UV rays through a rear-mounted carrier will age faster. Temperature extremes can cause cracking and loss of flexibility. Also, if the spare is mounted under the vehicle (as in many trucks and SUVs), road salt and moisture can corrode the wheel and damage the tire. Check the spare at least twice a year, and always verify the pressure before a long trip. A spare that has been driven on should be inspected for damage; if it shows signs of wear, replace it immediately.
When to Replace a Spare Tire
Replace any spare tire that is more than 10 years old, regardless of appearance. Look for the Department of Transportation (DOT) code on the sidewall; the last four digits indicate the week and year of manufacture (e.g., 2319 means the 23rd week of 2019). Also replace if you see cracks, bulges, or the tread is worn below 2/32 of an inch. For donut spares, replace if the tire has been used for more than 70 miles or if it is over 6 years old. Always replace a spare that has been driven on at high speeds or over rough terrain, as internal damage may not be visible.
Frequently Asked Questions
Can I use a spare tire that is 15 years old?
No. A 15-year-old spare tire is unsafe due to rubber degradation, even if it has never been used. The rubber hardens and loses grip, increasing the risk of blowouts. Replace any spare over 10 years old.
How often should I check my spare tire pressure?
Check your spare tire pressure at least every month and before any long road trip. Donut spares typically require 60 PSI, while full-size spares need the same pressure as your regular tires (check your owner’s manual). Underinflation can cause the tire to fail when needed.
Can I drive on a donut spare on the highway?
You can drive on a donut spare on the highway, but only for a short distance (50 miles max) and at speeds no higher than 50 mph. Driving faster or farther risks tire failure and loss of vehicle control. Replace the donut with a full-size tire as soon as possible.
The Bottom Line
Spare tires are not meant to last forever. Replace a full-size spare after 10 years and a donut spare after 6-8 years, regardless of use. Always check the manufacturing date, maintain proper inflation, and inspect for damage regularly. For more tire maintenance tips, explore our tire care resources and ensure your spare is ready when you need it. Remember, a spare tire is a temporary solution; replace it with a regular tire as soon as possible.
More Tires Guides
Video Guide
Video: Related tutorial from YouTube