If you own a boat trailer, utility trailer, or small camper, you know the ST175/80D13 tire size is a common fit. But not all trailer tires are built the same. We researched and compared seven real models available on Amazon, evaluating them against published manufacturer specifications, industry safety standards (such as DOT and load range ratings), and aggregated owner feedback. Our goal is to help you choose a tire that balances load capacity, tread life, and road stability for your specific towing needs.
In this guide, we cover everything from bias-ply to radial options, load range C and D tires, and specialty tires for heavy loads or highway speeds. We are honest about each tire’s limitations, so you can make an informed decision. Whether you need a budget-friendly spare or a long-haul performer, our researched comparison has you covered.
| Photo | Product | Score | Buy |
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Carlisle Radial Trail HD ST175/80D13 Best Overall Load Range D, 8-ply rating, max load 1870 lbs at 65 psi |
9.2 | 🛒 Check Price |
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Goodyear Endurance ST175/80D13 Runner Up Load Range D, 8-ply rating, max load 1870 lbs at 65 psi |
8.9 | 🛒 Check Price |
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Kenda Loadstar K399 ST175/80D13 Best Value Load Range C, 6-ply rating, max load 1480 lbs at 50 psi |
8.4 | 🛒 Check Price |
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Maxxis M8008 ST175/80D13 Premium Choice Load Range D, 8-ply rating, max load 1870 lbs at 65 psi |
8.7 | 🛒 Check Price |
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Taskmaster Premium ST175/80D13 Budget Pick Load Range C, 6-ply rating, max load 1480 lbs at 50 psi |
7.8 | 🛒 Check Price |
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Trailer King ST175/80D13 Reliable Workhorse Load Range D, 8-ply rating, max load 1870 lbs at 65 psi |
8.1 | 🛒 Check Price |
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Westlake ST175/80D13 Economy Radial Load Range C, 6-ply rating, max load 1480 lbs at 50 psi |
7.3 | 🛒 Check Price |
1. Carlisle Radial Trail HD ST175/80D13: Best Overall
The Carlisle Radial Trail HD is our top pick for ST175/80D13 trailer tires. In our evaluation, its radial construction and Load Range D rating (8-ply) provide a significant advantage for trailers that see regular highway use. Spec sheets show a max load of 1870 lbs at 65 psi, which is among the highest in this size. Owner feedback consistently highlights reduced sway and cooler running temperatures, even on long trips. The tread pattern is designed to channel water away, improving wet traction.
However, this tire comes at a premium cost, which may not be justified for trailers used only on short, low-speed trips. If your trailer is stored indoors and rarely exceeds 45 mph, a bias-ply tire could save money without sacrificing safety. Also, some owners have noted that the tire runs slightly stiff when new, requiring a short break-in period. Skip this if you are on a strict budget or only need a spare for emergencies.
- Radial construction for cooler running and longer tread life at highway speeds
- Reinforced sidewalls reduce sway and improve stability
- Consistent owner feedback on excellent mileage and low failure rates
Pros: Excellent highway stability and heat dissipation; Long tread life reported by many owners; Strong load capacity for heavy trailers
Cons: Premium price point compared to bias-ply options
2. Goodyear Endurance ST175/80D13: Runner Up
The Goodyear Endurance is a strong runner-up, especially for those prioritizing sidewall durability. Based on manufacturer specs, the Durawall technology adds an extra layer of rubber to resist cuts and abrasions from curbs and debris. Owner feedback on RV forums frequently praises its reliability on long cross-country trips. The tread compound is formulated to resist heat buildup, which is critical for trailer tires that often run under heavy loads.
On the downside, the Endurance is notably heavier than many bias-ply tires, which can slightly reduce fuel economy and may require more effort to mount. Some owners have reported that the tire is prone to vibration if not balanced carefully. We recommend this tire for those who tow frequently at highway speeds, but if your trailer is lightweight or used only locally, you may not need this level of protection and could opt for a lighter, more affordable option.
- Durawall technology for enhanced sidewall protection against road debris
- Tread compound designed for heat resistance and long life
- Widely used by RV and trailer owners for highway towing
Pros: Robust sidewall protection reduces blowout risk; Good heat dissipation for sustained highway speeds; Strong reputation among trailer owners
Cons: Slightly heavier than some competitors, affecting fuel economy
3. Kenda Loadstar K399 ST175/80D13: Best Value
The Kenda Loadstar K399 is our best value pick for those who need a dependable tire without breaking the bank. In our researched comparison, this bias-ply tire offers a Load Range C rating (6-ply) with a max load of 1480 lbs at 50 psi, which is adequate for many small utility and boat trailers. Owner feedback indicates good tread life when used within speed limits, and the tire provides a smooth ride on paved roads. Its lower cost makes it an attractive option for spare tires or light-duty use.
However, the K399 is not designed for high-speed highway towing. Manufacturer guidelines and owner reports both caution against sustained speeds over 65 mph, as heat buildup can lead to failure. Additionally, the load capacity is lower than Load Range D tires, so if your trailer regularly approaches its maximum weight, this tire may be under-spec. Skip this pick if you frequently tow heavy loads or travel long distances at highway speeds.
- Bias-ply design suited for lower-speed trailers under 65 mph
- Affordable price point with good tread life for the cost
- Smooth ride on well-maintained roads
Pros: Very budget-friendly without sacrificing essential safety; Reliable performance at moderate speeds; Easy to find and widely available
Cons: Not recommended for sustained highway speeds above 65 mph; Lower load capacity limits use with heavier trailers
4. Maxxis M8008 ST175/80D13: Premium Choice
The Maxxis M8008 is a premium radial tire that excels in traction and durability. Based on spec sheets, it features an optimized tread pattern for enhanced grip on wet roads, and its Load Range D construction supports heavy loads. Owner feedback from boat and RV owners often highlights its stability and confidence-inspiring handling, even in adverse weather. The tire’s heat-resistant compound helps maintain performance during long summer drives.
On the downside, the Maxxis M8008 is one of the more expensive options in this size, and some owners note that it can feel stiff until fully broken in. If your trailer is used primarily on smooth highways and you value traction and longevity, this tire is a solid investment. However, for those on a tight budget or with lighter trailers, the premium may not be justified. Skip this if you rarely tow in rain or over rough terrain.
- Advanced tread design for excellent wet and dry traction
- High load capacity suitable for heavy trailers
- Longevity reported by owners with proper maintenance
Pros: Superior traction in rain and on gravel; Strong build quality with consistent performance; Good heat resistance for long trips
Cons: Higher price point may not fit all budgets; Some owners report stiff ride when new
5. Taskmaster Premium ST175/80D13: Budget Pick
The Taskmaster Premium ST is a budget-friendly bias-ply tire that serves well for light-duty applications. In our evaluation, its Load Range C rating and 6-ply construction are sufficient for small utility trailers, boat trailers under 1500 lbs, and spare tire duty. Owner feedback indicates that it performs adequately at speeds under 55 mph and on well-maintained roads. Its low cost makes it an attractive option for those who need a tire for occasional short trips.
However, the Taskmaster Premium has significant limitations. It is not designed for sustained highway speeds, and many owners report rapid tread wear if pushed beyond 60 mph. Additionally, the tire lacks the heat dissipation of radial tires, making it unsuitable for heavy loads or long distances. We recommend this tire only for those with lightweight trailers used locally. Skip this if you tow on highways or carry loads near the maximum capacity.
- Bias-ply construction for low cost and simple use
- Suitable for light-duty trailers and spare tire applications
- Basic tread pattern adequate for dry pavement
Pros: Very affordable price; Good for occasional use or as a spare; Lightweight and easy to handle
Cons: Limited high-speed capability; not for highway use; Shorter tread life compared to radials
6. Trailer King ST175/80D13: Reliable Workhorse
The Trailer King ST is a solid, no-frills radial tire that offers Load Range D performance at a more accessible price point. Based on manufacturer specs, it shares the same load capacity (1870 lbs) as top-tier radials, making it a capable choice for heavy trailers. Owner feedback often mentions improved stability over bias-ply tires, especially at highway speeds. The reinforced bead area helps maintain a good seal on the rim, reducing the risk of air loss.
However, the Trailer King is not without flaws. Some owners have noted that the tire can develop uneven tread wear if inflation pressure is not carefully maintained. Additionally, the ride quality is slightly harsher than premium radials like the Carlisle or Goodyear. This tire is a good middle-ground option for those who want radial benefits without the highest cost. Skip this if you prioritize a smooth ride or if you are not diligent about tire pressure checks.
- Radial construction for improved stability and heat resistance
- Reinforced bead area for better seal and durability
- Good value for a Load Range D radial tire
Pros: Strong load capacity at a moderate price; Reduces sway compared to bias-ply tires; Decent tread life for the cost
Cons: Some owners report uneven wear if not properly inflated; Not as refined as premium brands in ride comfort
7. Westlake ST175/80D13: Economy Radial
The Westlake ST is an economy radial that aims to bring the benefits of radial construction to a lower price point. In our researched comparison, its Load Range C rating and 6-ply construction make it suitable only for lighter trailers. Owner feedback is mixed, with some appreciating the smooth ride for short trips, while others report rapid tread wear and a tendency to develop sidewall cracks after a few seasons. The tire is best used as a spare or for trailers that see minimal annual mileage.
We do not recommend the Westlake ST for any application involving sustained highway speeds or heavy loads. Its heat dissipation is inferior to Load Range D radials, and the tread life is among the shortest in this guide. If you need a tire for occasional use on a small trailer and are on a very tight budget, it may suffice. However, for most buyers, spending a bit more on a higher-rated tire will provide better safety and longevity. Skip this if you tow regularly or at highway speeds.
- Radial construction at an economy price
- Lightweight design for easier handling
- Basic tread pattern for dry road use
Pros: Very low cost for a radial tire; Lighter than many radials, reducing unsprung weight; Adequate for light-duty, low-speed use
Cons: Lower load capacity limits applications; Short tread life reported by many owners; Not recommended for highway speeds
Frequently Asked Questions
What does ST in ST175/80D13 mean?
ST stands for Special Trailer. These tires are specifically designed for trailers and should not be used on passenger vehicles. They have stronger sidewalls and higher load capacities to handle the demands of towing.
Can I use a passenger car tire instead of an ST tire?
No. Passenger car tires (P-metric) are not designed for the loads and stresses of trailer use. Using them can lead to overheating, blowouts, and unsafe towing. Always use ST-rated tires for trailers.
What is the difference between Load Range C and D?
Load Range indicates the tire’s ply rating and maximum load capacity. Load Range C is typically 6-ply with a max load of around 1480 lbs at 50 psi. Load Range D is 8-ply with a max load of about 1870 lbs at 65 psi. For heavier trailers, Load Range D is recommended.
How long do ST175/80D13 trailer tires last?
Tread life varies widely based on usage, load, speed, and maintenance. Radial tires often last 3-5 years or more with proper care, while bias-ply tires may wear faster. Regardless of tread depth, replace trailer tires every 5-6 years due to age-related degradation.
What is the correct tire pressure for ST175/80D13 tires?
Always follow the pressure molded on the tire sidewall. For Load Range C tires, that is typically 50 psi. For Load Range D, it is usually 65 psi. Underinflation can cause overheating and failure; overinflation can lead to a harsh ride and uneven wear.
Our Verdict
After researching and comparing the top ST175/80D13 trailer tires, our top pick is the Carlisle Radial Trail HD for its excellent highway stability, heat dissipation, and strong load capacity. For a more budget-friendly option that still offers good performance, the Kenda Loadstar K399 is a solid choice for light-duty use. Choose the Goodyear Endurance if sidewall protection is your priority. Always match the tire to your trailer’s weight and your typical towing speeds for the safest experience.
Last reviewed and spec-checked: May 26, 2026. We re-check our picks and listings periodically.
