Best RV Trailer Tires (2026): ST vs LT, Load Range, and What Actually Lasts
Trailer tires fail on age, not miles. Here's what to look for and which categories deserve your money.
Trailer tire failures cost more than the tires themselves — they take out fenders, wiring, brake lines, and sometimes bring the whole rig to a stop somewhere unpleasant. And nearly every trailer tire failure is preventable with the right tire, the right pressure, and replacement on the right schedule.
This guide covers ST vs LT, load ranges, the age-out problem, and where the price premiums are actually worth paying.
ST vs LT: The Choice
Special Trailer (ST) tires
Purpose-built for trailer service — stiffer sidewalls (less sway), higher pressure ratings, no drive-tire treadwear considerations. ST tires are what your trailer probably came with. Cheaper than LT of comparable rating. The category that includes both the best (Goodyear Endurance, Carlisle Radial Trail HD, Sailun S637) and the worst (nameless cheap imports).
Light Truck (LT) tires
Designed for pickup and truck use — heavier build, higher speed rating, better sidewall damage resistance. LT tires can be used on trailers if load rating and PSI match, and many full-timers prefer them for interstate towing at speed. Downside: heavier (more unsprung weight, marginally worse fuel economy), more expensive, larger physical size may not fit older trailer wheel wells.
Load Range: The Number That Matters
Load range letters indicate the tire's carrying capacity at its rated PSI:
| Load Range | Max PSI | Typical Use |
|---|---|---|
| C | 50 PSI | Light trailers under 5,000 lb GVWR |
| D | 65 PSI | Standard travel trailers 5,000–7,000 lb |
| E | 80 PSI | Larger trailers, fifth wheels 7,000–10,000 lb |
| F | 95 PSI | Heavy fifth wheels, toy haulers 10,000+ lb |
| G | 110 PSI | Commercial trailers, oversize rigs |
Match or exceed the trailer's placard requirement. Never downgrade a load range to save money — you're eating into the safety margin the trailer was designed around.
Brands That Earn Their Price
Not every brand deserves the money, and the cheapest tires cost the most when they fail. Rough breakdown:
Premium tier
Goodyear Endurance is the reigning safe pick — US-made, documented low failure rates, decent warranty. Sailun S637 (imported but well-regarded), Carlisle Radial Trail HD. All are worth the premium for peace of mind.
Mid tier
Maxxis M8008, Kenda Karrier — solid brands with good reputations, save $30–50 per tire over premium. Reasonable choice for occasional towing under 5,000 miles/year.
Skip tier
Nameless imports (usually from Southeast Asia or China) at bargain prices. Failure rates several times higher than premium. Common failure mode: sidewall separation in year 2–3 causing dramatic blowouts. Not worth the savings.
Age-Out Rule
The most important thing to know about trailer tires: they age from the day they're made, not from the day you install them. Every trailer tire has a DOT code on the sidewall. The last four digits are the week and year: "2023" means the 20th week of 2023.
Replacement rule of thumb: 5 years max for regularly-used trailers, 6–7 years for garage-stored occasional-use trailers. Signs the age is catching up: fine sidewall cracks (especially between tread and shoulder), stiff-feeling sidewalls when pressed, or visible dry rot on any surface. Any tire showing sidewall cracking should come off immediately regardless of age.
Storage That Extends Tire Life
- Keep tires out of direct sunlight — UV is the primary killer. Tire covers when parked matter.
- Store the trailer on wood or level ground, not on hot asphalt in summer.
- If storing over a season, block up the axles so tires aren't loaded flat in one spot for months.
- Keep tires at rated pressure during storage, not deflated.
- Wash off road salt after winter trips — chloride accelerates sidewall degradation.
The Overloading Problem
Even the best trailer tires fail if the trailer runs consistently over its GVWR. Weigh the loaded rig at a CAT scale once — the results usually surprise owners. Loading up to the trailer's rated capacity and pairing with premium tires gives you the safety margin the engineers designed around. Chronic overloading eats through even Goodyear Endurance tires in months rather than years.
Bottom Line
Buy premium (Goodyear Endurance or equivalent), match or exceed your placard's load range, and replace on age (5–7 years) not tread wear. TPMS on top of good tires prevents most remaining failures. The math strongly favors quality — one blowout typically costs more than upgrading the whole tire set.
Trailer tires are cheap insurance. Skip the wrong corner and the insurance disappears.
Understanding the DOT Code
Every tire has a DOT code molded into the sidewall — a series of characters starting with "DOT." The last four digits are what matter for age tracking:
- First two digits: week of manufacture (01–52).
- Last two digits: year.
Example: "2023" means the 20th week of 2023 — mid-May 2023. That's your starting clock for the age-out replacement rule. New-tire buyers should check the DOT code before purchase — "new" tires that have been sitting in a warehouse for two or three years are common in bargain deals and rob you of that shelf life.
Common Tire Failure Modes
Understanding how trailer tires fail helps you spot problems before catastrophic failure:
- Sidewall bulge: Impact damage from a curb strike or pothole. Cord damage under the sidewall creates a visible bulge. Fatal — replace immediately.
- Sidewall cracking: Age and UV exposure. Fine cracks between tread and shoulder are the first sign. Once cracking is visible, tire life is measured in weeks not years.
- Tread separation: The tread layer separates from the carcass. Often preceded by unusual vibration or a bulge on the tread face. Common failure mode for aged tires.
- Overheating: Underinflation or overloading. Tire runs hot, compound degrades, and eventual sudden failure. TPMS catches this early.
Storage That Adds Years
Storage kills more trailer tires than road use does. The practices that extend life:
- Block the axles. A trailer sitting on tires all winter develops flat spots in the sidewalls. Jack stands under the frame or axles remove that load.
- Cover the tires. UV is the primary killer. Even white vinyl tire covers dramatically slow sidewall degradation. Cheap insurance.
- Move the rig occasionally. If storage extends beyond three months, a short move every 60–90 days lets tires flex briefly and rotates the loaded contact patch.
- Wash road salt off before storage. Chloride attacks rubber over months of contact. A rinse before storage catches this.
Frequently Asked Questions
Can I run LT tires instead of ST tires on my trailer?
You can if the LT is the same or higher load capacity at the same PSI and the wheel is compatible. LT tires generally have stiffer sidewalls (less sway) and often last longer in miles, but weigh more and cost more. Many long-haul full-timers switch to LT with satisfaction; most weekend towers stay with ST.
How often do trailer tires need to be replaced?
Age matters more than tread. Most trailer tires should be replaced at 5–7 years regardless of mileage. Check the DOT code on the sidewall — the last four digits are week and year of manufacture. A tire made 6+ years ago has hardening sidewalls even if tread looks fine, and sidewall failures are how trailer tires typically go.
Is Goodyear Endurance really worth the price premium?
For most owners, yes. Endurance tires are made in the USA, have documented lower failure rates than cheap imports, and carry a decent warranty. The 'China bomb' cheap imports save $30–50 per tire and blow out at rates several times higher. On a 4-tire trailer, one blowout typically costs more than the whole set upgrade.
What load range do I need?
Load range D is standard for trailers up to about 6,000 lb GVWR. Load range E goes up to 8,000–10,000 lb. Load range F/G is for 12,000+ lb fifth wheels and toy haulers. Look at your trailer's placard for tire size and load rating requirements — running below spec is what causes most fatigue failures.
What's the speed rating on trailer tires?
Older ST tires were rated 65 mph maximum, which surprised a lot of owners. Modern ST tires from major manufacturers are typically rated for 75–80 mph, matching typical interstate speeds. LT tires generally rate higher. Check the sidewall speed rating letter (L = 75 mph, M = 81 mph, N = 87 mph).