Enclosed Trailer Size Guide: From 5x8 to 8.5x24 and Everything In Between

Shopping for a small enclosed trailer is straightforward until you realize that "small" means different things depending on whether you're moving furniture across town or hauling motorcycles to a track day. Enclosed trailers are sold in a wide range of floor sizes, interior heights, and axle configurations, and getting the size wrong in either direction creates real problems — either you can't fit what you need to carry, or you've bought more trailer than your tow vehicle can handle.

NC Trailers carries enclosed cargo trailers at its Thomasville and Winston-Salem locations including the Alcom Cargo Pro and Alcom Cargo Pro Stealth aluminum lines alongside standard steel cargo options. This guide maps each size category to the buyers and use cases it actually fits, so you can narrow the decision before visiting the lot.

How Enclosed Trailer Dimensions Work

When you see a trailer listed as a 7x16, those numbers refer to the exterior floor width and length. Interior dimensions are smaller — typically 2 to 4 inches narrower and a few inches shorter in length depending on the wall construction and framing method. A 7-foot wide trailer has an interior width closer to 6'6" to 6'8" on most standard builds.

Interior height is listed separately and varies significantly between models at the same floor size. Two 6x12 trailers can have different interior heights depending on whether they were built with a flat roof or a higher profile. Always confirm the interior height specification, not just the floor dimensions, when comparing trailers — it determines whether you can stand upright inside and whether tall cargo like shelving units or motorcycles with handlebars will clear the ceiling.

Enclosed Trailer Size Chart

Note: Empty weights above are general reference ranges. Actual weights vary by manufacturer, wall construction, axle configuration, and options. Confirm the specific trailer's weight on the VIN plate before matching to your tow vehicle.

5x8 and 6x10: The Small Enclosed Trailer Category

A small enclosed trailer in the 5x8 or 6x10 range is the right answer for a specific buyer: someone who needs weather protection and security for a light, occasional load and is working with a smaller tow vehicle. These trailers typically ride on a single axle with a GVWR around 2,990 to 3,500 pounds, which puts them within reach of most mid-size SUVs, crossovers with a tow package, and smaller trucks.

The use cases are personal rather than commercial: moving household items, hauling motorcycles or ATVs to a weekend destination, transporting equipment for a hobby or small side project. Interior height at this size is typically 6 feet or just under, which works for most cargo but is tight for anyone trying to stand fully upright while loading. If you are buying this size for anything other than light personal use, step up to the 6x12 category and gain substantially more versatility.

6x12: The Most Versatile Entry-Level Contractor Trailer

The 6x12 enclosed trailer is where the market transitions from personal hauling to light commercial use. At 6,000 to 7,000-pound GVWR depending on axle configuration, a 6x12 handles tools, lawn equipment, mobile service setups, and small inventory loads. It is wide enough to fit a zero-turn mower or two motorcycles side by side in some configurations, and long enough to carry 8-foot materials flat on the floor.

Single-axle 6x12 trailers are common and manageable behind half-ton trucks. Tandem-axle configurations at this size offer more payload and better stability but require a truck with a stronger tow rating. If you are considering a 6x12 for regular business use — daily loading and unloading, commercial cargo, or anything approaching the weight limit consistently — the tandem axle is worth the additional cost.

The Alcom Cargo Pro aluminum utility trailers at NC Trailers offer aluminum construction at this size category, which reduces empty trailer weight and increases net payload compared to steel equivalents at the same GVWR rating.

7x16: The Standard for Contractors and Motorsports Buyers

The 7x16 is the size most contractors, landscape businesses, and motorsports enthusiasts land on when they need a real working trailer. At 7 feet wide and 16 feet long, it accommodates a full set of landscape equipment, two motorcycles with room to spare, a race car on a platform dolly, or a substantial mobile service setup with shelving and toolboxes along the walls.

Interior height on a standard 7x16 runs 6'6" to 7'0" depending on the build — tall enough to stand comfortably while loading, and tall enough to fit most motorcycles and ATVs without worrying about handlebar clearance. Tandem axle is the standard configuration at this size, with GVWR ratings commonly ranging from 7,000 to 10,000 pounds. A three-quarter-ton or one-ton truck is the appropriate tow vehicle.

The Alcom Cargo Pro Stealth aluminum enclosed car hauler is available in this size range and provides the payload advantage of aluminum construction for buyers who want to maximize usable load without moving up in trailer size.

Interior Height: Why It Matters More Than Most Buyers Realize

Interior height is the dimension that most buyers do not check carefully enough until they get the trailer home. If you plan to use the trailer as a mobile workspace — mounting shelving, working on equipment inside, or accessing overhead storage — 7-foot interior height is the practical minimum for an adult of average height. A 6-foot interior gets cramped quickly in a working environment.

8.5x20 and 8.5x24: Wide-Body Trailers for Serious Applications

Wide-body enclosed trailers at 8.5 feet are built for buyers whose cargo simply does not fit in a 7-foot interior — race cars with wide body kits, show vehicles, commercial equipment transport, and production crews who need the full interior as a mobile workspace or storage system. At 8.5 feet wide, the interior typically runs 8'0" to 8'2", which comfortably accommodates vehicles up to around 96 inches wide with room to walk alongside them.

These trailers are heavy. A 8.5x24 tandem axle enclosed trailer can weigh 3,000 to 3,500 pounds empty, and with a GVWR of 9,990 to 14,000 pounds, the net payload is substantial but so is the tow vehicle requirement. A one-ton truck is the minimum for this class. Many buyers in this category also consider financing given the higher purchase price relative to smaller configurations.

Single Axle vs. Tandem Axle for Enclosed Trailers

Single-axle enclosed trailers are appropriate for trailers in the 5x8 to 6x12 range used for light personal or occasional commercial hauling. They are lighter, less expensive, and easier to maneuver in tight spaces. The tradeoff is payload capacity and the absence of a redundancy — a single tire failure leaves you with no backup on that axle.

Tandem axle configurations are the right choice for any enclosed trailer used regularly for business, for trailers in the 7x16 and larger category, and for any buyer who will consistently load the trailer near its weight capacity. The stability improvement at highway speed with a loaded tandem axle trailer is noticeable compared to a comparably loaded single axle, and the added bearing and brake maintenance cost is modest relative to the operational benefit.

Find Your Size at NC Trailers

NC Trailers stocks enclosed trailers across the full size range at Thomasville and Winston-Salem. Browse the current enclosed trailer inventory to see what is available before visiting, and compare aluminum Alcom Cargo Pro options against standard steel configurations in your target size. If the purchase will be financed, the trailer financing page covers available terms for both personal and business buyers. Sizing questions are easy to resolve in person — the team at either location can walk you through the specific dimensions and configurations on the floor before you commit.