ST185/80R13 Trailer Tire Set - Heavy Duty 8-Ply Upgrade

In this review of the ST185/80R13 trailer tire set the bottom line is straightforward: these are a practical, heavy-duty option for trailer owners who prioritize load capacity and sidewall protection. The tires are a set of four new premium radials with a full nylon cap ply overlay that crosses the entire tread area, a feature that reviewers pointed to as a real upgrade over many trailer tires that only add nylon on the shoulder. For someone hauling regularly or taking long trips with heavy loads, the combination of 8-ply load Range D construction and a scuff guard ring makes these tires a sensible, value-minded choice.

Key Features

• Full nylon cap ply: The nylon cap ply overlay runs across the entire tread area to add strength and reduce tread separation risk under load.
• 8-ply construction: Heavy duty 8 ply rated design and Load Range D translates to higher load capacity per tire for demanding trailer use.
• Scuff Guard ring: A raised scuff guard on the tire wall helps protect the sidewall and rim area from curb and chafe damage.
• Trailer-specific tread: Pattern and build are designed for trailer service, prioritizing load stability and even wear over cornering performance.
• Speed rating M: Rated for speeds up to 81 mph, suitable for highway towing when used within load and inflation limits.

Who It's For

These tires are aimed at owners of utility trailers, boat trailers, small campers and other tow-behind equipment who need a rugged, higher-capacity tire that will handle repeated hauling and long runs. Buyers who value a reinforced tread structure and added sidewall protection will appreciate the full nylon overlay and scuff guard features.

Not intended for passenger cars or for buyers who need a tire for heavy highway performance driving; these are trailer-only tires and rims are not included. If long-term decomposition or age-related separation is a primary concern, consider checking manufacturer and distributor warranty terms and service history before purchase.

Pros & Cons

Pros

• Durable 8-ply, Load Range D construction supports heavy loads and frequent hauling.
• Full nylon cap ply overlay offers better tread reinforcement than tires with only shoulder strips.
• Scuff Guard ring provides extra sidewall and rim protection during loading and maneuvering.
• Good ride quality reported on long trips and solid value for the price.

Cons

• Designed strictly for trailer use and sold without rims, so fitment and mounting are additional considerations.
• Some users reported long-term issues after extended use, so expect to monitor for wear and separation over time.

Specifications

Our Verdict

For trailer owners who tow regularly and need reliable load capacity, this set is a practical, cost-effective choice thanks to its 8-ply construction, full nylon cap ply overlay and scuff guard sidewall protection. It represents good value for many hauling applications, but buyers should confirm fitment and keep an eye on long-term wear.

Frequently Asked Questions

Are rims included?
No, these tires are sold without rims and must be mounted separately.

Can these tires be used on passenger vehicles?
No, they are designed for trailer use only and should not be used on passenger cars.

What is the load capacity?
Each tire has a maximum load of 1710 lbs at 65 psi, reflecting its 8-ply Load Range D rating.