Tires & Tubes

Why Trailer Tires Are a Category All Their Own

When it comes to trailering, the tires beneath your rig are one of the most safety-critical components you can choose — yet they're often an afterthought. Trailer tires are not interchangeable with passenger car or light truck tires. They are purpose-built to do something fundamentally different: carry heavy, non-driven loads over long distances while keeping the trailer stable and predictable behind the tow vehicle.

Trailer-specific tires — typically designated ST (Special Trailer) — feature stronger sidewalls engineered to resist the lateral forces and swaying that occur during towing. They also carry a significantly higher load index than comparably sized passenger tires, making them the correct choice for utility trailers, boat trailers, horse trailers, travel trailers, and fifth-wheel rigs alike.

Radial vs. Bias-Ply: Choosing the Right Construction

The two main trailer tire constructions each serve different needs. Radial tires have steel belts running across the tread, which delivers better stability, longer tread life, reduced rolling resistance, and improved heat resistance — making them well-suited for highway towing and long-distance hauls. Bias-ply tires are built with crisscrossed nylon layers that create stiffer, more rigid sidewalls, giving them added durability on rough terrain, farm applications, and off-road use where puncture resistance matters more than ride smoothness.

For most boat trailer owners and campers spending the majority of their time on highways, radial construction is typically the preferred choice. If you're hauling construction equipment, agricultural implements, or livestock over unpaved terrain, bias-ply tires may be the more practical option.

Key Factors When Shopping for Trailer Tires

• Load Range: Load range is indicated by a letter (C, D, E, F, and higher), with higher letters denoting greater load-carrying capacity. Always choose a tire whose load range meets or exceeds your trailer's rated weight.
• Speed Rating: Most trailer tires are rated for around 65–75 mph. Exceeding the speed rating causes heat buildup that can lead to blowout — always stay within the rated limit.
• Tire Size: Follow your trailer manufacturer's specifications exactly. Never downsize a trailer tire to save money, as this compromises your safety margin.
• Tread Pattern: Ribbed highway tread works best for smooth road hauling; more aggressive lug patterns are better for off-road or farm trailer use.
• Inflation: Maintaining correct tire pressure is crucial. Underinflation leads to overheating and premature failure, while overinflation can cause uneven wear and a rougher ride.

Don't Forget the Tubes

While most modern trailer tires are tubeless, inner tubes remain an important part of the trailering world. Older rim designs, certain bias-ply tires, and tube-type (TT) designated tires still require inner tubes. A quality tube ensures consistent air pressure, helps prevent flats, and can extend the service life of your trailer tires — especially on trailers that see intermittent use or spend time in storage between seasons. Always match the tube size precisely to the tire size marked on your tire's sidewall, and verify that the valve stem type is compatible with your rim.

Top Brands for Trailer Tires & Tubes

For decades, Firestone has been one of the most recognized names in commercial and trailer tires. Backed by Bridgestone's engineering capabilities, Firestone's trailer tire lineup is designed for durable, long-haul performance — with features like five-rib tread designs for even wear and low-rolling-resistance construction for fuel efficiency.

Continental brings over a century of tire engineering expertise to the trailer market, offering vocation-specific designs focused on maximizing mileage, efficiency, and longevity. Continental's trailer tire technology incorporates advanced casing designs and tread compounds engineered to reduce operating costs for both commercial fleets and serious trailering enthusiasts.