4 GREMAX All Steel Heavy Duty Radial Trailer Tires ST 225/75R15 - 14

In this review the GREMAX All Steel ST 225/75R15 is evaluated as a heavy duty replacement for large trailers and big RVs; the bottom line is that it delivers substantial load capacity and a durable construction for towing heavy loads. Our review finds the most compelling reason to buy is the 14-ply rated, load range G design that supports up to 3,525 lbs on a single wheel at 95 psi, which makes these tires a sensible, cost-conscious choice when factory trailer tires are underspecified or worn out.

Key Features

• All steel construction: Provides a robust carcass meant to resist heavy use and maintain shape under trailer loads.
• 14 Ply rated, Load Range G: Offers high load capacity so heavy RVs and cargo trailers can carry larger payloads with confidence.
• High load capacity: Max load single 3,525 lbs and dual 3,195 lbs at 95 psi, which suits large trailers and heavy-duty towing situations.
• Trailer-specific tread: Designed for trailer use only, helping reduce irregular wear from vehicle steering forces and improving longevity when used properly.
• Deep tread depth: A 10/32nd tread depth offers more usable rubber for longer service life compared with many standard trailer tires.
• Industry distribution history: Sold in volume to manufacturers and dealers, indicating consistent availability and support from distributor channels.

Who It's For

The GREMAX All Steel ST 225/75R15 is aimed at owners of heavy RVs, equipment haulers and cargo trailers who need an upgrade from light-duty ST tires to a higher-capacity, 14-ply rated tire. It is a practical choice for people hauling heavy loads, towing often, or replacing worn factory tires with a tire that prioritizes load capacity and durability.

Those who should look elsewhere include drivers seeking tires for passenger cars or light trucks, and anyone who wants a tire rated for speeds or steering performance beyond trailer duty; this tire is designed for trailer use only and should not be used on driven axles. Also note rims are not included, so buyers must match rim specifications separately.

Pros & Cons

Pros

• High load rating and 14-ply construction give clear strength for heavy trailer and RV applications.
• Deep 10/32nd tread offers longer service life compared with many replacement ST tires.
• Customers report good overall quality, durability and a value-for-money proposition for heavy-duty use.
• Appearance and rollability are frequently praised, with some noting a semi-like look and easy rolling on trailers.

Cons

• Heavier weight makes handling and installation more strenuous, and some buyers found installation mixed in ease.
• Designed strictly for trailer use only, so it is not appropriate for driven or steering axles on vehicles.

Specifications

Tire Size	ST 225/75R15
Brand	GREMAX
Ply Rated	14 (Load Range G)
Max Load (single/dual)	3,525 lbs / 3,195 lbs @ 95 psi
Tread Depth	10/32nd
Load Index / Speed Rating	124/121 M
Rim Width	6J (rims not included)

Our Verdict

The GREMAX All Steel ST 225/75R15 is a sensible, value-oriented upgrade for owners of heavy trailers and RVs who need increased payload capacity and long wear life. Its 14-ply construction and high load ratings make it a practical choice where durability and load carrying matter more than lightweight handling; for trailer-specific needs it represents good value when matched with the correct rims and regular maintenance.

Frequently Asked Questions

Can these tires be used on passenger cars or driven axles?
Answer. No, these are designed for trailer use only and should not be used on driven or steering axles.

Do these tires come with rims?
Answer. No, rims are not included; buyers should confirm rim width and compatibility separately.

What is the maximum load capacity?
Answer. The maximum load is 3,525 lbs single and 3,195 lbs dual at 95 psi, per the tire specifications.