ROCKMAN Trailer Tire Wheel Assembly ST175/80R13 - Durable 6-Ply Spare

In this review the ROCKMAN Trailer Tire Wheel Assembly ST175/80R13 is judged as a practical, value-focused spare for light trailers and enclosed haulers. The single biggest reason to buy is its combination of a deeper 7mm tread and a 6-ply construction, which together deliver stronger wear resistance and longer mileage than many low-cost trailer tires. The review is aimed at owners who need a dependable, DOT-compliant trailer wheel that fits common 5 lug on 4.5' bolt patterns and offers straightforward fitment for a spare or replacement wheel.

Key Features

• Deep tread: The 7mm tread depth provides improved wear life and better resistance to chunking compared with many cheaper 5.6 mm alternatives.
• Strong construction: The 6 ply rating and Load Range C give a durable casing that handles trailer loads reliably up to the stated capacity.
• Load and speed: With a Load Index of 91 and Speed Rating M, the assembly supports typical trailer loads up to the rated limit while allowing highway travel up to 75 mph where legal.
• Wheel compatibility: The white spoke rim is drilled 5 lug on a 4.5' PCD with zero offset, making it a direct match for many common trailer hubs and spare applications.
• DOT safety certified: Meets or exceeds applicable DOT standards so it can be used season after season for cargo hauling with predictable performance.

Who It's For

This assembly is for trailer owners who want a low-cost but robust spare that looks clean on an enclosed trailer or utility trailer and who need a wheel that fits the common 5 lug on 4.5' bolt pattern. It is a good match for people who prioritize longevity and straightforward fitment over premium highway touring comfort.

Those who should look elsewhere include owners of heavy-duty commercial trailers that exceed the listed max load per tire or drivers who require a higher speed rating or specialized rim finish; for oversized loads or sustained high-speed service a heavier load range or different tire class may be required.

Pros & Cons

Pros

• Deeper 7mm tread gives noticeably longer wear than many economy trailer tires.
• 6 ply, Load Range C construction offers reliable strength for common trailer duties.
• 5 lug on 4.5' bolt pattern and white spoke rim make it an easy spare that fits typical hubs and looks tidy on enclosed trailers.

Cons

• Speed Rating M limits sustained highway speed to about 75 mph, so not ideal for high-speed continuous towing.

Specifications

Our Verdict

The ROCKMAN ST175/80R13 wheel assembly is a sensible, value-driven choice for trailer owners who need a reliable spare or replacement that lasts longer than budget tires. Its 7mm tread and 6 ply construction deliver stronger wear and dependable load performance, and the common 5 lug on 4.5' rim makes fitment straightforward. For most leisure and light commercial trailers this assembly represents good value and practical performance.

Frequently Asked Questions

Will this wheel fit my trailer with 5 lug on 4.5' hubs?
Yes, the rim is specified as 5 lug on a 4.5' PCD with offset 0, which matches common trailer hubs; always confirm with your owner's manual.

How much weight can each tire handle?
Each tire carries a Load Index of 91 with a listed max load of 1360 lbs per tire when properly inflated and mounted.

Is this DOT certified for road use?
Yes, the assembly meets or exceeds applicable DOT standards for trailer tire safety and road use.