On a pickup truck, the back part consists of the open cargo bed behind the cab and the tailgate that closes the bed opening; in a sedan or hatchback, the equivalent area is commonly called the trunk or boot. Understanding these terms helps with payload capacity, tire fitment (such as dually wheels), and replacement parts. This guide explains key components, dimensions, and how to identify them by name and function.
Key Parts at the Back of a Truck
The rear section varies by vehicle type. For pickups, the cargo bed sits behind the cab and typically includes side rails, a bed floor, and a tailgate. For cars, the rear storage area is the trunk, accessed via a hinged lid. A hatchback’s rear opening combines trunk and rear door into a single unit. Each design affects access, capacity, and aerodynamics.
Pickup Truck Bed Anatomy
The bed is the primary cargo area on a pickup. It usually includes the box walls, bed liner, and a tailgate that swings down or lifts up. The wall height and box length determine maximum payload. Dually wheels, positioned near the outer edges of the bed, add stability under heavy loads. Knowing bed length and wheel configuration helps choose correct accessories and tires.
Tailgate Functions and Types
The tailgate seals the bed opening and often serves as a step for climbing in. Some tailgates fold down to form a ramp; others remove entirely for easier loading. Modern designs may include lockable handles, integrated lighting, or warning labels. Correct use prevents cargo shift and improves safety on slopes.
Dually Wheels and Rear Axle Role
Dually wheels are dual wheels on one hub, typically at the rear axle. They increase load capacity and improve traction, especially for towing or hauling heavy materials. The rear axle and wheelbase length influence handling and stability. Choosing tires rated for the expected payload is essential for safety and longevity.
- Tailgate: closes and secures the cargo bed opening.
- Bed liner: protects box surfaces from wear and weather.
- Dually wheels: dual rear wheels for higher load capacity.
- Tail lights: positioned at the rear for visibility and signaling.
- Cargo box or trunk: storage area designed for payload or luggage.
Car Trunk vs Truck Bed Comparison
While a car trunk is an enclosed, fixed space, a pickup bed is open and configurable. This difference affects what can be carried and how securely. Bed length, box height, and tailgate design determine practical capacity. For drivers, understanding these differences guides choices for towing, hauling, and everyday use.
Measurement and Capacity Details
Key specifications include bed length, wheelbase, and payload ratings. These figures appear in the owner’s manual and on the vehicle’s certification label. Accurate numbers support proper loading and help avoid overloading the rear axle.
| Attribute | Verified Detail | Source Type |
|---|---|---|
| Bed length (example) | 1.5 to 2.4 meters for mid-size pickups | Manufacturer specifications |
| Payload capacity (example) | 300–600 kg depending on model | Manufacturer specifications |
| Dually wheel configuration | Dual rear wheels on one hub | Vehicle specifications |
| Tailgate operation | Swing-down or removable designs | Manufacturer specifications |
| Wheelbase range (example) | 2.8 to 3.4 meters for full-size pickups | Manufacturer specifications |
Practical Usage and Maintenance
Protect the bed with a liner and avoid overloading beyond rated capacity. Check tailgate seals and hinges regularly to maintain structural integrity. Inspect dually wheels for proper torque and tire pressure, especially before long trips. Proper care extends the life of the rear components and preserves resale value.
Regional and Usage Terms
Terms can vary. In some regions, the trunk is called the boot; in others, the back of a truck is referred to simply as the box or bed. Context matters: a delivery driver might refer to the payload area as the box, while a technician may use the official part names. Standardization helps when ordering parts or discussing repairs.
How to Identify Your Rear Components
Check the vehicle identification label on the door jamb for exact bed length, axle code, and wheelbase. Compare visible part numbers with manufacturer diagrams. If unsure, consult the owner’s manual or a verified parts catalog. Accurate identification supports correct repairs and compatible accessory selection.
Summary
The back part of a truck is generally the cargo bed on a pickup or the trunk on a sedan or hatchback. Key elements include the tailgate, bed liner, dually wheels at the rear axle, and tail lights. Understanding these terms and measurements improves safe loading, maintenance, and accessory compatibility. Use official specifications for payload, wheelbase, and tire ratings to guide decisions.