How Long Do Trailer Tires Last? A Complete Guide for Haulers
When it comes to towing a trailer—whether it’s for work, play, or anything in between—one of the most important (and most overlooked) components is the tires. Many trailer owners focus on weight capacity, hitches, and maintenance, but fail to pay attention to a question that could mean the difference between a smooth ride and a roadside nightmare: How long do trailer tires actually last?
Let’s break it down so you can tow smarter, safer, and more cost-effectively.
Average Lifespan of Trailer Tires
The general rule of thumb is that trailer tires last between 3 to 6 years, regardless of tread wear. Unlike passenger vehicle tires that wear down with miles, trailer tires often age out before they wear out—especially if the trailer isn’t used regularly.
How often should you replace your trailer tires? Most trailer tire manufacturers recommend replacing tires every 5 to 6 years, even if the tread still looks good. If the tires are showing signs of cracking, dry rot, or have been exposed to prolonged UV rays, they may need to be replaced even sooner.
Mileage Expectations
Factors That Impact Trailer Tire Lifespan
Several factors determine how long your trailer tires will actually last. Let’s take a look:
1. Storage Conditions
If you leave your trailer exposed to the elements year-round, the tires will degrade faster. UV rays, ozone exposure, and temperature swings all accelerate tire aging.
Pro Tip: Store your trailer in a covered area, use tire covers, or jack it up to reduce ground pressure.
2. Weight Load
Trailer tires are specifically designed for carrying heavy loads. Overloading can lead to excess heat buildup, tread separation, and blowouts. Always follow the manufacturer’s load rating.
3. Tire Pressure
Improper tire pressure is one of the fastest ways to destroy trailer tires. Underinflated tires run hotter, leading to quicker breakdowns. Overinflated tires are more prone to blowouts.
Check pressure before every trip—especially if your trailer has been sitting for a while.
4. Tire Type
There are two types of trailer tires:
- Bias-ply tires: Strong sidewalls, good for off-road or rugged use, but shorter tread life.
- Radial tires: Longer tread life and better for highway towing.
Choosing the right type for your usage can impact lifespan dramatically.
5. Driving Habits
Sudden braking, fast cornering, or high-speed hauling can reduce the life of your tires. Smooth, consistent driving helps keep tires in good shape.
How to Inspect Your Trailer Tires
Not sure if your tires are due for replacement? Here’s what to look for:
1. Check the DOT Date Code
On the sidewall of every tire is a 4-digit code following “DOT.” This tells you the week and year the tire was manufactured. For example, “3419” means the tire was made in the 34th week of 2019.
If your tires are more than 5 years old—even with low mileage—it’s time to consider replacing them.
2. Look for Cracks
Dry rot or cracking along the sidewall is a red flag. These small cracks indicate the rubber is breaking down due to age or environmental exposure.
3. Bulges or Bubbles
Any bulge or bubble on the tire is dangerous. It could be a sign of internal damage or separation and requires immediate replacement.
4. Uneven Tread Wear
This could signal an issue with your trailer’s suspension, axle alignment, or inflation pressure. Uneven wear shortens the life of your tires and affects towing stability.
5. Flat Spots
If your trailer has been sitting in one place for too long, tires can develop flat spots. These affect ride quality and can lead to premature failure.
Tips to Extend the Life of Your Trailer Tires
Want to get the most mileage—and time—out of your trailer tires? Here are some best practices:
1. Maintain Proper Inflation
Check tire pressure before each trip. Invest in a quality tire pressure gauge and always follow the manufacturer’s recommended PSI (printed on the tire sidewall or trailer sticker).
2. Balance Your Load
Uneven distribution causes excessive stress on individual tires. Make sure your cargo is evenly placed and secured to reduce wear.
3. Rotate Tires
If your trailer has a dual axle, rotate the tires annually to help them wear evenly. This can help prolong their lifespan.
4. Use Tire Covers
When storing your trailer outdoors, UV-resistant tire covers can protect the rubber from sun damage and extend the tire’s usable life.
5. Keep It Clean
Wash your tires occasionally to remove road grime, chemicals, and salt (especially important in winter or near coastal areas).
6. Avoid Prolonged Storage on Concrete or Dirt
If your trailer will be sitting for months, use wheel blocks or jack stands. Concrete can cause flat spotting, and moist dirt can speed up dry rot.
Replacing Trailer Tires: What to Know
When it’s time to replace your trailer tires, keep these factors in mind:
Choose the Right Size and Rating
Check your owner’s manual or existing tire sidewalls for size (like ST205/75R15) and load range (such as Load Range C or D). Trailer tires are marked “ST” (Special Trailer) and are different from vehicle tires.
Stick With ST Tires
Some people try to use car or light truck tires on trailers. Don’t. ST tires are designed with stiffer sidewalls for towing stability.
Replace All at Once?
If all your tires are the same age, it’s smart to replace them together. However, if one is damaged and the others are still in good shape and under 3–4 years old, you may get away with just replacing the damaged one.
Common Trailer Tire Questions
Can I use passenger tires on my trailer?
No. Trailer tires (marked ST) are made with stronger sidewalls to handle the unique stress of towing. Using passenger or light truck tires can result in sway, instability, and blowouts.
How often should I check my tire pressure?
Before every trip, even short ones. Tires lose pressure naturally over time and due to temperature changes.
Are radial trailer tires better than bias-ply?
For highway use and long hauls, yes. Radial trailer tires offer smoother rides, better fuel efficiency, and longer life. Bias-ply tires are better for rugged or off-road use.
What is the best tire pressure for my trailer tires?
Always follow the tire manufacturer’s maximum PSI rating, which is molded into the sidewall. Do not rely on car PSI guidelines—they don’t apply to trailers.
Final Thoughts
If you’re hauling equipment, boats, ATVs, livestock, or cargo, trailer tires are your foundation. Treat them with the same care and attention you give to your towing vehicle. Most blowouts, breakdowns, and trailer issues trace back to tire neglect.
So, how long do trailer tires last? If you:
- Keep them properly inflated,
- Avoid overloading,
- Store them properly,
- And replace them every 5–6 years…
…you’ll stay ahead of the curve and avoid those costly, frustrating roadside emergencies.
Check your tires today. Or stop over and have the experts at Glacial Lakes do it for you. It might just save your weekend trip, your equipment—and your wallet.