Answering the top questions buyers have when shopping for ST175/80R13 trailer tire rims: which assemblies deliver reliable load support, correct fitment, and ready-to-run DOT approval? The best options below cover radial and bias ply tires, white spokes and black rims, and both 5-lug and standard 4.5″ bolt patterns. These picks are suited for utility trailers, boat trailers, and small utility trailers that require a dependable, ready-to-mount tire assembly. The following table highlights core specs to compare at a glance.
| Product | Tire Type | Rim Size / Bolt Pattern | Load Range / Max Load | Warranty |
|---|---|---|---|---|
| eCustomrim 2-Pack Radial Trailer Tire Rim Assembly ST175/80R13 5 Lug White | Radial | 13×4.5 in, 5×4.5 | Load Range C, 1360 lbs | 6 years |
| eCustomrim 2-Pack Trailer Tire Rim Assembly ST175/80D13 Load Range C | Bias Ply | 13×4.5 in, 5×4.5 | Load Range C, 1360 lbs | 2 years |
| eCustomrim 2-Pack Radial Trailer Tire Rim Assembly ST175/80R13 Black 5 Lug | Radial | 13×4.5 in, 5×4.5 | Load Range D, 1610 lbs | 6 years |
| Free Country Trailer Tire Wheel ST175/80R13 6PR C 91N 5X4.5 White Spoke | Radial or 6PR variant | 5×4.5 | 6PR, 91M | — |
| ROCKMAN Trailer Tire & Wheel ST175/80R13 6-Ply 91M 5X4.5 White Spoke | 6-Ply | 5×4.5 | Load Range C, 91 | — |
eCustomrim Radial White 5 Lug ST175/80R13 Assembly
This complete tire-and-wheel assembly uses a radial trailer tire rated for 1360 lbs at 50 PSI, with a 23.9″ overall diameter and Load Range C. The 13×4.5 inch rim features a 3.19″ center bore and a 5-on-4.5″ bolt pattern. DOT-approved as a ready-to-use package, it emphasizes safe, consistent performance for standard trailers. Best for: trailers needing a reliable, ready-to-mount radial assembly with a white rim that matches common trailer aesthetics. Caution: limited to radial tires; not ideal for bias-ply needs.
Selected for its standard fitment, straightforward mounting, and warranty coverage, this option is ideal for DIY trailer owners seeking a durable, DOT-approved radial assembly with roadside assistance. The six-year warranty offers long-term support for consistent use.
eCustomrim Bias Ply 5 Lug ST175/80D13
This assembly uses a bias-ply tire rated for 1360 lbs at 50 PSI, with a 24.4″ diameter and Load Range C. The rim is 13×4.5 inches with a 3.19″ center bore and a 5×4.5″ bolt pattern. The package is DOT-approved and includes roadside assistance. Best for: trailers that require a bias-ply option, or when a slightly higher sidewall angle is preferred for rougher road conditions. Limitation: bias-ply tires generally wear differently than radial tires and may influence ride feel.
Chosen for compatibility with older trailer setups and for users who prefer bias-ply characteristics, this option pairs a proven tire type with a secure, standard rim. The warranty is shorter than some radials, but the DOT assembly remains a safety priority.
eCustomrim Radial Black 5 Lug ST175/80R13
This radial assembly increases load capacity to 1610 lbs max at 65 PSI, with a 23.9″ diameter and Load Range D. The rim remains 13×4.5 inches with a 5-lug pattern, and the package is DOT-approved with a six-year warranty and roadside assistance. Best for: heavier loads or towing on higher-speed routes, where extra ballast helps stability. Limitation: higher tire pressure may affect ride comfort and highway noise compared to lighter-duty radials.
Selected for higher load capability and a bold black rim look, this option balances performance with a durable rim configuration. Roadside support adds a practical safety net for frequent travelers or fleet use.
Free Country White Spoke ST175/80R13 6PR
Featuring a safety-focused nylon cap ply overlay and a “Scuff Guard” ring on the tire wall, this Free Country assembly emphasizes durability and rim protection. The tread depth is 7 mm, longer than many competitors, aiding mileage life. Best for: cost-conscious buyers who want robust protection features and a white spoke look. Caution: data notes 7mm tread depth but does not specify exact ply rating in the description beyond 6PR.
The product is selected for its practical safety enhancements and longer tread life, offering a good balance of protection, mileage, and a classic trailer wheel style.
Free Country Silver Spoke ST175/80R13 8PR
This 8PR variant increases construction robustness with a 7 mm tread depth and a durable mileage profile. The 5×4.5″ bolt pattern is compatible with common trailer rims, and the white or silver spoke style provides a lighter aesthetic. Best for: trailers that require extra puncture resistance and longer life for frequent highway miles. Limitation: heavier tire construction can impact unsprung weight and fuel efficiency slightly compared to lighter 6PR options.
eCustomrim Bias Ply 5 Lug LRC ST175/80D13
This bias-ply assembly lists a 24.4″ diameter and Load Range C, with a 13×4.5″ rim and 5×4.5″ bolt pattern. It aligns with older trailer wheels requiring bias-ply configurations and a standard 5-lug mount. Best for: compatibility with legacy wheel setups and those who prefer proven bias-ply performance. Caution: bias-ply tires can ride differently than radials and may wear at a different rate.
Buying Guide: Key Considerations For ST175/80R13 Trailer Tire With Rim
What should you check before buying? First, confirm your trailer’s bolt pattern and rim width (commonly 5×4.5 inches for many ST175/80R13 assemblies). Decide between radial or bias-ply based on typical road conditions and desired ride characteristics. Radials generally offer better tread wear and stability at highway speeds, while bias-ply can be more economical and suit older setups. Ensure the max load and tire pressure align with your trailer’s gross vehicle weight and axle configuration.
Durability and protection matter. Look for nylon cap ply overlays and rim protection features like Scuff Guards, which help prevent rim damage on curb or rock-heavy surfaces. Tread depth affects mileage; a deeper tread like 7 mm can translate to longer life in demanding conditions. Warranty length indicates the manufacturer’s confidence in long-term performance and available roadside assistance.
Compatibility matters beyond size. DOT-approved assemblies ensure safety compliance, and a ready-to-run package reduces installation steps. If you tow frequently or carry heavy loads, consider higher load ratings (Load Range D) and robust 6PR or 8PR tires for added resilience. Budget-conscious buyers may prioritize 6PR or standard DOT assemblies with solid warranties.
Frequently Asked Questions
- What does ST175/80R13 mean? It describes a trailer tire size with a 175 mm section width, 80% aspect ratio, and 13-inch wheel diameter.
- Radial vs. Bias Ply: which is better for trailers? Radial tires generally offer better fuel efficiency, stability, and wear. Bias ply can be suitable for older trailers or cost-conscious setups.
- Why is wheel bolt pattern important? The bolt pattern must match your trailer hub to ensure proper lug alignment and secure mounting.
- What is Load Range? It indicates the tire’s maximum load capacity. Choose a higher Load Range for heavier trailers or higher speeds.
- Is a DOT-approved assembly necessary? DOT approval confirms the tire, wheel, and stem meet safety standards for on-road use.
- Should I consider tread depth? Deeper tread provides longer life and better wet traction, but may add weight; balance with intended use.