Trailer tires usually age out before they wear out, so check the date code before the tread. Replace them with special-trailer (ST) rated tires, not passenger or light-truck tires. El Paso Tire Shop in El Paso, TX can size and mount them; call with the size on your sidewall.
A trailer sits for weeks and then carries a full load at highway speed. That pattern kills tires differently than a daily driver does: the tread looks fine while the sidewall rubber has gone stiff and cracked.
If you only ever look at tread depth on your trailer, you are checking the wrong thing.
Why do trailer tires blow out with tread left?
Age and underinflation. A trailer tire that has been parked in the sun develops cracks in the sidewall, and a soft tire flexes more under load, which builds heat. Look for hairline cracking between the tread blocks and along the sidewall, and read the date code stamped near the rim.
Uneven wear on one tire only usually points to a bent axle or worn bearing rather than a bad tire.
Can I put regular truck tires on a trailer?
Match what the trailer was built for. Trailer tires carry an ST marking and have stiffer sidewalls to resist sway. A passenger or light-truck tire in the same diameter has a different load rating and flexes differently under a heavy tongue weight.
Whatever you choose, the load range must meet or exceed the number on the trailer's certification label.
What should I bring in?
Bring the trailer if you can, because axle, bearings and wheel all affect the fit. Otherwise bring the full size and load range from the tire sidewall, plus the spare so it can be checked at the same visit.
A spare that has never touched the road can still be too old to trust. Ask for it to be inspected along with the rest.
How often should trailer tires be replaced?
By age and condition, not just mileage. Check the date code and look for sidewall cracking, because a tire with plenty of tread can still be unsafe.
Do trailer tires need to be balanced?
Yes, ask for it. An unbalanced trailer wheel can vibrate and accelerate wear on the tire and bearings, especially at highway speed.
Can you service a trailer from outside El Paso?
Call El Paso Tire Shop with your location and the tire size and ask. The shop serves 8 service areas around El Paso, TX.