4 GREMAX Heavy Duty All Steel Trailer Tires ST215/75R17.5 - 18 Ply

In this review of the GREMAX Heavy Duty ALL STEEL ST215/75R17.5 trailer tires, the bottom line is clear: these are purpose-built tires for heavy trailer use where high load capacity and long wear matter most. The reviewer found them especially suited to commercial haulers, boat and RV trailers, and anyone who needs consistent highway stability. The most compelling reason to buy is the 18-ply, Load Range J construction that delivers a maximum single-tire capacity of 4,805 lbs, giving confidence when carrying heavy loads over long distances.

Key Features

• All steel construction: The full steel build provides robust sidewall and carcass strength to resist damage and maintain shape under heavy trailer loads.
• 18 Ply Rated, Load Range J: The high ply rating yields remarkable load carrying capacity, reducing stress and heat buildup on long hauls.
• High load capacity: With a max load of 4,805 lbs per single tire, these handle heavy trailers without sacrificing stability.
• Trailer-specific design: Engineered for trailer use only, the tread and carcass prioritize even wear and reduced sway when towing at highway speeds.
• New, first-quality tires: These arrive unused and unmounted, matching the same OEM-quality stock that wholesalers supply to manufacturers.
• Distributor limited warranty: Coverage from the tire distributor gives an added layer of confidence after purchase.

Who It's For

These GREMAX ST215/75R17.5 tires are best for owners of heavy utility trailers, horse trailers, RV and boat trailers, and anyone running frequent long-distance tows who needs a high-capacity, durable tire. Fleet operators and trailer builders who buy in volume will appreciate the wholesaling pedigree and consistent first-quality condition.

These are not for passenger cars or light trailer applications where a lower load rating and softer ride are preferred; they are trailer-only tires and require appropriate 17.5 in rims. If you want a passenger or mixed-use tire with a softer ride, or need tires pre-mounted on wheels, consider other options.

Pros & Cons

Pros

• Exceptional load capacity and rugged all-steel construction for demanding trailer duty.
• Customers report strong durability and minimal wear even after long highway runs.
• Designed to reduce sway and sidewall flex, improving towing stability at speed.
• Good value for heavy-duty replacement tires sold in sets of four at wholesale quality.

Cons

• Trailer-only rating means these are not suitable for use on drive axles of passenger vehicles.
• Rims are not included, so additional purchase and mounting are required before use.

Specifications

Tire Size	ST215/75R17.5
Brand / Pattern	GREMAX GM600
Ply Rating / Load Range	18 Ply Rated, Load Range J
Max Load (Single)	4,805 lbs
Max Load (Dual)	4,540 lbs
Overall Diameter	30.2 in
Section Width / Rim Width	8.3 in / 6 in

Our Verdict

The GREMAX ST215/75R17.5 all steel trailer tires are a solid choice for heavy-duty towing thanks to their 18-ply construction and high single-tire capacity. They deliver durable highway performance with reduced sway and minimal sidewall flex, making them good value for trailer owners who need dependable, long-lasting tires and are prepared to fit their own rims.

Frequently Asked Questions

Are these tires suitable for highway towing?
Yes. They are designed for trailer use and customers report smooth highway rides and stable towing performance.

Do the tires come mounted on rims?
No. Rims are not included; tires are sold new and unmounted so you will need to mount them on 17.5 in rims.

What is the load capacity per tire?
Each tire has a maximum single load capacity of 4,805 lbs and is rated 18-ply, Load Range J.