Five signs your trailer tires need to be replaced

Passenger-car habits do not apply cleanly to trailers. ST (special trailer) tires carry more load with stiffer sidewalls, and they often sit in the sun for months. Many failures happen with tread still showing.

Watch for weather checking — small cracks in the sidewall or between treads. Look at the date code (the last four digits of the DOT number are week and year). Many manufacturers treat six or seven years as the outer limit, even with leftover tread. Uneven wear, cupping, and a trailer that wanders can point to alignment, a bent axle, or a tire that has taken a set from sitting.

Bulges, exposed cord, and a tire that will not hold air are immediate replacements. Mixing a radial with bias-ply tires on the same axle is a bad idea; constructions flex differently and load ratings stop meaning what the sidewall says.

If you need a mounted assembly, we carry common ST sizes as tire-and-wheel combinations so you can bolt on a balanced unit and get back on the road. Bring the size, load range, and bolt pattern — or the wheel itself.