How Long Do Trailer Tires Last?

01What the industry actually says

There is no single authoritative interval, and anyone who quotes you one as settled fact is rounding off a more complicated picture. The U.S. Tire Manufacturers Association's own position is that service and storage conditions vary so widely that the serviceable life of a specific tire cannot be predicted from calendar age alone — which is a careful way of saying that a tire kept covered in a barn and a tire baked on a gravel lot are not the same tire at five years old.

Around that, the guidance clusters. Michelin publishes a firm recommendation to replace tires ten years after manufacture regardless of condition. Many vehicle manufacturers put their recommendation at six years. Tire manufacturer warranties commonly expire at six years from the date of manufacture, which is a useful signal about what the makers themselves consider a normal service life.

Trailer-specific advice runs shorter than all of that, and for good reason — trailer tires spend more of their lives parked, loaded and in the sun. Trailer outlets and RV dealers land most often on three to six years, with five years the most common single number. Tredit, one of the larger trailer tire and wheel distributors, structures its own limited warranty around five years in service with a discretionary sixth year on select brands.

Put together honestly: plan on replacing trailer tires somewhere in the three-to-six-year window, treat six years as the point where you need a specific reason not to, and treat the condition of the sidewall as able to move that date earlier but never later.

02Miles almost never decide it

Reported mileage figures for trailer tires vary enormously because trailer use varies enormously, but the range people report — very roughly 5,000 to 15,000 miles before something ends the tire — tells you the important thing: a trailer that goes out six weekends a year will hit its age limit with most of its tread still there.

The exceptions are trailers that work. A landscape trailer towed daily, a car hauler on the interstate, a livestock trailer running to auction every week — these can genuinely wear tread, and they also heat-cycle their tires hard enough that age matters even more, not less. If your trailer earns money, inspect on the same schedule you would use for truck tires and expect to replace on wear as well as age.

The rear tires of a tandem axle typically wear faster than the front, because the rear pair does more of the scrubbing every time the trailer is turned tight in a yard. Uneven wear front to rear on a tandem is normal; uneven wear across the face of one tire is not, and usually means pressure or a bent axle.

03How to read the date code

Every tire carries a DOT code on the sidewall, and the last four digits are the manufacturing date: the first two are the week of the year and the last two are the year. A tire stamped 2124 was built in the 21st week of 2024 — late May.

The catch is that the full DOT code, including the date, is often molded on only one sidewall. If you look and find a DOT code that ends after the plant and size characters with no four-digit date, you are looking at the partial side; check the other face of the tire. On a trailer that usually means crawling under or jacking a wheel, which is one more reason to do it once, write the date on a note in the trailer, and stop guessing.

Check the date code before you buy, not after. Trailer tires in slower-moving sizes can sit in a warehouse for a year or more, and a tire that is already two years old is starting its life with two of its useful years spent. It is a fair question to ask a shop, and a shop that cannot answer it is telling you something.

Do the same for the spare. It ages at exactly the same rate as the four on the ground and gets checked roughly never.

04The five things that actually kill trailer tires

Underinflation. The most-cited cause of trailer tire failure, and the most preventable. A soft tire flexes more, flexing makes heat, and heat destroys the casing from the inside while the tire still looks completely normal from outside. ST tires are meant to run at or near their maximum sidewall pressure — 50 psi for Load Range C, 65 for D, 80 for E — checked cold before the day's first mile.

Overloading. Trailer tires carry very high loads relative to their size, which means there is less margin than on a car tire to begin with. Loading a trailer past its GVWR, or loading it badly enough that one axle takes far more than its share, puts a tire over its rating without any warning to the driver.

UV and ozone. This is the one people underestimate, because it happens while the trailer is doing nothing. Sunlight and atmospheric ozone break down the rubber compound over time, producing the fine cracking on the sidewall and in the tread grooves that trailer tire warranties call weather checking. Once it is visible, the tire is done regardless of tread.

Heat. Speed, load and pressure combine into heat, and heat is what turns a marginal tire into a blowout. This is why the speed rating on the sidewall matters and why bias-ply and older radial ST tires carry a 65 mph limit that many drivers ignore.

Flat-spotting and sitting. A trailer parked in the same position for months puts a sustained load on one part of each tire. Moving the trailer occasionally — even a few feet — or blocking it up for long-term storage avoids setting a flat spot that never fully recovers.

05How to make them last as long as they can

Check cold pressure before every trip, not every season. This is the single highest-value habit on the list and it takes two minutes with a gauge that costs less than a meal.

Cover them when parked. Tire covers are inexpensive and they attack the exact failure mode — UV — that ends most trailer tires. If covers are impractical, parking in shade is most of the benefit.

Do not park on bare dirt or grass long-term if you can avoid it. Moisture and ground contact accelerate degradation from the bottom while the sun works on the top. A board or a paver under each tire is a cheap improvement.

Inspect the sidewalls, not the tread. Run a hand around each sidewall looking for fine cracking, bulges and cuts. A bulge means the casing has failed internally and the tire comes off now, not at the end of the trip — see tire sidewall bulge.

Replace in sets, and include the spare in the plan. A single new tire next to a five-year-old one on a tandem axle means the old one is carrying the risk for both.

Keep the load honest. Know the trailer's GVWR, know roughly what you are putting on it, and put heavy items over the axles rather than at the back.

06When it is time, in West Georgia

The math on replacing early is not close. A set of four small utility trailer tires runs roughly $240 to $440, and a blowout on a tandem-axle trailer at highway speed routinely takes the fender, the wiring harness and part of the skirting with it, on top of whatever the cargo does when the trailer starts moving around. Replacing a set on age is cheap compared to almost every alternative.

This directory does not track which shops carry trailer tires as a separate service — no shop in it lists that as its own line item — but 73 of the 75 shops listed across Carroll, Douglas, Paulding, Haralson and Heard counties sell and mount tires, and the common small ST sizes are widely stocked. Call with the size and load range from your trailer's certification label and ask for the date code on whatever they would install.

RimsAndTires is a free directory rather than a tire seller. Tell us your trailer's tire size and we will match you with a local shop.

What different sources say about tire replacement age