Aluminum vs. Steel Enclosed Trailers: Which One Should You Buy?
If you're shopping for an aluminum enclosed trailer, the first decision you'll face isn't brand or size — it's material. Aluminum and steel enclosed trailers are built for the same purpose but engineered differently, and the choice has real consequences for your payload capacity, long-term maintenance costs, and how the trailer holds up in North Carolina's climate. NC Trailers carries both materials across multiple product lines, so this comparison is based on what buyers actually encounter in the field, not a generic rundown.
Understanding the difference before you walk the lot saves time and avoids an expensive mismatch. Here's what you need to know.
What Makes Aluminum and Steel Enclosed Trailers Different
The core difference comes down to frame and skin. Steel enclosed trailers use tube steel framing with a steel skin — welded, heavy, and well-suited to carrying dense loads. Aluminum trailers use aluminum framing with an aluminum or aluminum-composite exterior skin, which sheds weight while maintaining structural integrity for most cargo applications.
That weight difference is not cosmetic. A comparable 6x12 steel enclosed trailer typically weighs between 1,500 and 1,900 pounds empty. An aluminum-framed equivalent often comes in at 1,100 to 1,400 pounds. With a 7,000-pound GVWR trailer, that 300 to 500-pound savings translates directly into additional payload capacity — which matters if you're loading tools, equipment, or inventory to the limit of your tow rating.
The Aluminum vs. Steel Comparison at a Glance
| **Feature** | **Aluminum Enclosed Trailer** | **Steel Enclosed Trailer** |
|---|---|---|
| Wall Material | Aluminum skin over aluminum frame | Steel skin over tube steel frame |
| Typical Weight (6x12) | ~1,100–1,400 lbs | ~1,500–1,900 lbs |
| Corrosion Resistance | Excellent — does not rust | Moderate — depends on coating |
| Upfront Cost | Higher | Lower |
| Long-Term Maintenance Cost | Lower | Higher in humid/coastal conditions |
| Payload Advantage | ~300–500 lbs more than comparable steel | Less payload due to heavier frame |
| Repair Complexity | Aluminum welding required | More widely repairable |
The Case for Aluminum: Alcom Cargo Pro at NC Trailers
NC Trailers carries the Alcom Cargo Pro aluminum utility and landscape line and the Alcom Cargo Pro Stealth aluminum enclosed cargo hauler, both purpose-built for buyers who want to maximize usable payload without compromising weather protection or security.
Aluminum's advantage sharpens over time in two situations. First, if your trailer will see regular exposure to coastal air, high humidity, or road salt during winter months, aluminum simply does not rust. Steel, even with high-quality powder coat finishes, can develop surface rust and eventually structural corrosion at welds, joints, and floor seams if the finish is scratched or chipped. Second, if you're running close to your tow vehicle's rated capacity, an aluminum trailer gives you back hundreds of pounds in usable load — weight you can put to work instead of pulling empty trailer frame.
The tradeoff is upfront cost. Aluminum trailers typically cost more than steel equivalents at the same size and specification. They also require aluminum welding for structural repairs, which is more specialized work than steel welding. Most general trailer repair shops can handle steel; fewer work regularly with aluminum frames.
The Case for Steel: Big Tex and Standard Cargo Options
Steel enclosed trailers built on heavy tube frames are the right tool when your cargo is dense, your loads are heavy, or your use case involves rough terrain, job sites, or frequent impacts. Steel frames flex less under point loads and handle abuse better than aluminum in high-stress hauling applications.
NC Trailers carries Big Tex Trailers across multiple categories, including enclosed configurations suited to commercial use. Steel is also easier and cheaper to repair in most markets — if you work in a rural area where a local welding shop is your fastest repair option, steel keeps you from waiting on a specialized aluminum welder.
The lower purchase price of steel trailers also makes them the practical choice for buyers with tight budgets who need maximum trailer right now. If you're in a seasonal business and the trailer pays for itself in the first year, a lower upfront cost often makes more financial sense than the long-term efficiency gains from aluminum.
Which Material Makes Sense for Your Use Case
Choose aluminum if:
You're hauling light-to-medium cargo (tools, equipment, merchandise) and need the maximum payload from your tow rating. Your trailer will be stored outdoors or exposed to weather regularly. You plan to keep the trailer five or more years and want to minimize maintenance costs. You're located near the coast or in an area with high humidity year-round.
Choose steel if:
Your loads are consistently heavy and the weight savings from aluminum won't change what you can legally or safely haul. Your tow vehicle has significant headroom above your typical load. Upfront cost is the primary constraint. You operate in a rural area where steel welding repair is faster and cheaper to access.
Size Still Matters More Than Material for Most Buyers
Material is a meaningful choice, but trailer size determines whether the trailer works at all. If you need a 7x16 to haul your business equipment, buying a 6x12 in aluminum to save weight misses the point. Browse NC Trailers' enclosed trailer inventory to see current stock in both aluminum and steel configurations before deciding. Knowing what's available in your size and budget range is the practical first step.
If you're unsure whether your tow vehicle can handle the trailer you need, the GVWR and tongue weight ratings on both the trailer and your truck's towing guide will tell you what's possible. Both aluminum and steel trailers carry those ratings on the VIN plate.
Financing Both Aluminum and Steel Enclosed Trailers
The higher upfront cost of aluminum trailers is one reason many buyers consider financing. NC Trailers offers trailer financing options for both material types. Monthly payments can make the cost difference between aluminum and steel manageable when spread over a 24-to-60-month term, and business buyers may qualify to deduct the purchase under IRS Section 179. Apply or learn more at the NC Trailers trailer financing page.
Making the Decision
Aluminum enclosed trailers offer a meaningful advantage for buyers who haul light cargo, want maximum payload, and plan to own the trailer for years in a humid climate. Steel enclosed trailers are the better fit for heavy hauling, budget-conscious buyers, and situations where ease of repair matters more than long-term maintenance savings. Neither material is universally better — the right answer depends on what you're hauling, where you're storing it, and how long you plan to own it.
NC Trailers carries aluminum Alcom Cargo Pro and steel enclosed options at its Thomasville and Winston-Salem locations. If you want to compare both side by side before deciding, stop by or browse the enclosed trailer inventory online. If financing is part of the plan, the team can walk you through current terms before you commit.
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