Whether you're becoming an owner-operator, starting a trucking company, expanding your fleet, or simply curious about commercial transportation, this guide explains the most common types of semi-trailers, what they're used for, and which industries rely on them every day.
What Is a Semi-Trailer?
A semi-trailer is a trailer designed to be pulled by a semi-truck (tractor). Unlike a regular trailer, a semi-trailer has no front axle and connects to the truck using a fifth-wheel hitch. Semi-trailers move nearly every product Americans buy — from food and furniture to heavy equipment and automobiles.
1. Dry Van Trailer
The most common trailer on American highways. A dry van is a fully enclosed trailer that protects cargo from weather and theft.
Common Freight
- Pallets
- Furniture
- Clothing
- Electronics
- Retail products
- Paper products
- Packaged foods
- Consumer goods
Best For: General freight.
2. Refrigerated Trailer (Reefer)
A reefer is a temperature-controlled trailer with its own refrigeration unit.
Common Freight
- Produce
- Frozen foods
- Dairy
- Meat
- Pharmaceuticals
- Flowers
- Medical supplies
Best For: Perishable products.
3. Flatbed Trailer
Flatbeds have no sides or roof. This allows forklifts and cranes to load cargo from any direction.
Common Freight
- Lumber
- Steel
- Pipe
- Building materials
- Machinery
- Equipment
Best For: Oversized freight.
4. Step Deck Trailer (Drop Deck)
A step deck has two deck heights, allowing taller freight without exceeding legal height limits.
Common Freight
- Construction equipment
- Tractors
- Agricultural machinery
- Tall machinery
5. Double Drop Trailer (Lowboy)
One of the lowest trailers available. Designed for extremely tall and heavy equipment.
Common Freight
- Bulldozers
- Excavators
- Cranes
- Mining equipment
- Industrial machinery
6. Removable Gooseneck (RGN)
An RGN allows the front of the trailer to detach so equipment can be driven directly onto the deck.
Common Freight
- Excavators
- Dozers
- Military equipment
- Oversized construction equipment
7. Conestoga Trailer
A flatbed with a rolling tarp system. Offers weather protection without requiring overhead loading.
Common Freight
- Steel
- Machinery
- Lumber
- Building materials
8. Curtain Side Trailer
Instead of solid walls, these trailers use retractable curtains.
Common Freight
- Side loading
- Weather protection
- Faster loading
9. Container Chassis
Designed to transport shipping containers.
Common Freight
- Ocean containers
- Intermodal freight
- Imports
- Exports
10. Tank Trailer
Built to haul liquids and gases.
Common Freight
- Fuel
- Gasoline
- Milk
- Chemicals
- Water
- Liquid food products
11. Pneumatic Tank Trailer
Uses air pressure to unload dry bulk products.
Common Freight
- Cement
- Flour
- Plastic pellets
- Sand
- Lime
12. Hopper Bottom Trailer
Popular in agriculture. Gravity unloads products through bottom hoppers.
Common Freight
- Corn
- Soybeans
- Wheat
- Feed
- Fertilizer
13. Walking Floor Trailer
The trailer floor moves hydraulically to unload cargo.
Common Freight
- Mulch
- Compost
- Recyclables
- Wood chips
- Agricultural products
14. End Dump Trailer
Hydraulically lifts from the front.
Common Freight
- Dirt
- Gravel
- Asphalt
- Sand
- Demolition debris
15. Side Dump Trailer
Material exits through the side instead of the rear.
Common Freight
- Faster unloading
- Better stability
- Reduced rollover risk
16. Livestock Trailer
Designed to safely transport animals.
Common Freight
- Cattle
- Horses
- Sheep
- Pigs
- Goats
17. Logging Trailer
Specifically designed for hauling timber.
Common Freight
- Logs
- Utility poles
- Lumber
18. Auto Transport Trailer
Designed to move multiple vehicles.
Common Freight
- Cars
- SUVs
- Pickup trucks
- Commercial vehicles
19. Car Hauler Wedge Trailer
Popular with owner-operators. Usually carries two to five vehicles.
Common Freight
- Cars
- Trucks
- SUVs
20. Heavy Haul Multi-Axle Trailer
Designed for extremely heavy freight.
Common Freight
- Wind turbine components
- Transformers
- Industrial equipment
- Power plant components
21. Extendable Flatbed
The trailer stretches to carry unusually long cargo.
Common Freight
- Beams
- Windmill blades
- Utility poles
- Bridge components
22. Stretch RGN
An extendable removable gooseneck. Used for the largest oversized loads.
Common Freight
- Oversized machinery
- Heavy equipment
- Specialized freight
23. Belly Dump Trailer
Common in road construction. Material exits through gates underneath the trailer.
Common Freight
- Sand
- Gravel
- Asphalt
24. Chip Trailer
Lightweight trailer built for hauling wood chips.
Common Freight
- Mulch
- Bark
- Sawdust
- Wood chips
25. Garbage & Refuse Trailer
Used in waste management.
Common Freight
- Trash
- Recycling
- Construction debris
Which Semi Trailer Makes the Most Money?
There isn't one answer. Income depends on:
- Freight demand
- Market conditions
- Experience
- Operating costs
- Region
Some specialized trailers, such as lowboys, RGNs, and heavy-haul trailers, may command higher rates because they require specialized equipment and expertise.
Which Semi Trailer Is Best for New Drivers?
Many first-time owner-operators begin with:
- Dry Vans
- Flatbeds
- Reefers
These trailer types generally have widespread freight availability and are commonly used throughout the industry.
Can You Finance a Semi Trailer?
Absolutely.
Commercial trailer financing is available for many types of semi-trailers, including:
- Dry Vans
- Reefers
- Flatbeds
- Step Decks
- Lowboys
- RGNs
- Hopper Bottoms
- Tank Trailers
- Logging Trailers
- Livestock Trailers
- Walking Floors
- Dump Trailers
- Container Chassis
- Conestoga Trailers
- Curtain Side Trailers
Whether you're purchasing new or used, financing may be available.
Frequently Asked Questions
What's the most common semi-trailer?
The dry van is generally considered the most common trailer used in over-the-road trucking.
What's the best trailer for oversized freight?
Lowboys, double drops, RGNs, and extendable flatbeds are commonly used for oversized and overweight loads.
What's the difference between a flatbed and a step deck?
A flatbed has one continuous deck height. A step deck has an upper and lower deck, allowing taller freight to be transported while staying within legal height limits.
What's the difference between a reefer and a dry van?
A reefer has a refrigeration unit for temperature-sensitive cargo. A dry van does not.
Can you finance a semi trailer?
Yes. Commercial trailer financing is available for many types of semi-trailers, including dry vans, reefers, flatbeds, step decks, lowboys, RGNs, hopper bottoms, tank trailers, and more.
Finance Your Commercial Trailer
Whether you're an owner-operator purchasing your first trailer or a trucking company expanding your fleet, WeFinanceTrailers.com helps customers explore financing options for a wide range of commercial and recreational trailers.
We offer financing options for:
- Dry Vans
- Flatbeds
- Reefers
- Step Decks
- Lowboys
- RGNs
- Hopper Bottoms
- Dump Trailers
- Container Chassis
- Livestock Trailers
- Logging Trailers
- Walking Floors
- Utility Trailers
- Equipment Trailers
- Gooseneck Trailers
- Enclosed Trailers
- RVs
- Travel Trailers
The right trailer can help you move more freight, win larger contracts, and grow your business.
Apply todayFinance the trailer you need. Keep America moving.