Rear Loader Garbage Truck Capacity: What Size Does Your Route Need?

Rear loader garbage truck capacity is usually described by the internal volume of the refuse body, measured in cubic yards or cubic meters. Current manufacturer lineups show rear loaders ranging from compact 6–13 yd³ bodies to full-size models of 20–32 yd³. The right size depends on much more than body volume. Route density, waste type, chassis weight limits, hopper size and compaction performance all affect how much waste the truck can actually carry.

This distinction matters for fleet managers. A 25 yd³ body does not mean the truck can safely carry 25 cubic yards of every type of waste at maximum density. Volume and legal payload are two different limits.

What Does Rear Loader Garbage Truck Capacity Mean?

Three different figures may appear when comparing a rear loader:

• Body capacity: the internal volume available for compacted refuse.
• Hopper capacity: the volume of the rear loading area before waste is packed into the body.
• Payload capacity: the actual weight of waste the chassis can legally and safely carry.

These figures should not be treated as interchangeable.

For example, New Way lists its current rear loader range from 6–8 yd³ compact Diamondback models through 20–32 yd³ King Cobra models. Hopper capacities also vary between these designs.

Heil likewise offers different rear loader families. Its listed body sizes include 13–26 yd³ for the PT1100 and up to 32 yd³ for larger rear loader configurations.

These manufacturer examples show why buyers should specify whether they are discussing body volume, hopper volume or payload weight.

Common Rear Loader Garbage Truck Capacity Ranges

There is no single standard capacity for every rear loader. Manufacturers build different body sizes for different routes.

A practical way to understand the market is to divide rear loaders into three broad groups:

These ranges are examples from current manufacturer product families, not universal industry standards. Exact capacity depends on the body manufacturer and selected chassis.

For international buyers using metric units, one cubic yard is about 0.765 cubic meters. A 20 yd³ body is therefore roughly 15.3 m³, while a 32 yd³ body is around 24.5 m³.

However, converting the volume does not tell you the vehicle's legal payload.

Compact Rear Loaders

Small rear loaders are useful when maneuverability matters more than maximum route volume.

New Way lists its Diamondback in 6 and 8 yd³ versions. Its Viper range covers 9–13 yd³. The company describes these smaller models for applications such as high-density areas, parks and lower-volume residential routes.

Heil also publishes 9, 11 and 13 yd³ versions of its Mini Rear Loader.

A smaller body can make sense when:

• streets are narrow;
• turning space is limited;
• collection points are close to the disposal site;
• daily refuse volume is relatively low;
• a larger chassis would create access problems.

The trade-off is straightforward: less body volume can mean more trips to unload.

Medium-Capacity Rear Loaders

Bodies around the mid-teen to 20 yd³ range can serve many residential and mixed routes.

New Way's Cobra models, for example, are offered in 16, 18 and 20 yd³ configurations.

This capacity range can offer a balance between maneuverability and collection volume. It may suit fleets that collect household refuse, bags, carts and selected commercial containers on the same route.

The correct chassis still matters. Increasing body volume increases the space available for refuse, but it can also change body weight, wheelbase requirements and axle loading.

Large Rear Loaders

Larger rear loaders are designed for routes where collection volume is high enough to justify a bigger body.

Current New Way models reach 32 yd³, while Heil also lists rear loader bodies up to 32 yd³ in several product families.

A larger body can reduce the number of unloading trips when the route generates enough waste to use that capacity.

It is not automatically the better choice.

A larger body can require:

• a heavier chassis;
• greater axle capacity;
• more road and turning space;
• a longer wheelbase;
• closer attention to loaded weight.

Fleet operators should therefore size the complete vehicle, not just the refuse body.

Body Volume Is Not the Same as Payload

This is one of the most important points in rear loader selection.

Body capacity measures volume. Payload measures weight.

Two trucks with the same 20 yd³ body can carry very different legal payloads if their chassis, body weights and axle ratings differ.

Waste density also changes the result.

A truck collecting light residential packaging may fill its body by volume before reaching its weight limit. A truck handling dense wet waste may approach its permitted weight before the body looks completely full.

That is why a procurement specification should review:

1. chassis GVW or GVWR;
2. front and rear axle ratings;
3. empty chassis weight;
4. refuse body weight;
5. installed options;
6. expected waste density;
7. required payload.

Body manufacturers themselves connect chassis selection with capacity. Heil's Mini Rear Loader documentation, for example, provides different minimum chassis requirements for its 9, 11 and 13 yd³ bodies.

Simply requesting "the biggest rear loader available" is therefore not a reliable fleet specification.

How Compaction Changes Practical Capacity

A rear loader does not work like an open dump body.

Waste first enters the rear hopper. A hydraulic packing mechanism then moves and compresses it into the main body. This allows the vehicle to carry more loose refuse within a limited body volume.

Compaction performance varies by body design and operating conditions.

Manufacturers may publish figures such as pounds of refuse per cubic yard rather than only giving a simple compression ratio. For example, Heil lists payload-density figures of up to 800 lb/yd³ for its PT1000 and up to 1,000 lb/yd³ for the PT1100.

These figures are product-specific. They should not be applied to every rear loader.

Real operating results can change with:

• cardboard content;
• food and organic waste;
• moisture;
• bulky items;
• mixed municipal waste;
• packing cycle;
• hydraulic system condition.

For purchasing decisions, use the performance specification for the exact body being quoted.

Hopper Capacity Also Affects Collection Efficiency

Fleet buyers often focus on the main body and overlook the hopper.

The hopper is where workers or lifting equipment place waste before the packing cycle moves it forward.

A larger hopper can be useful for bulky bags or commercial collection because more material can enter before another packing cycle is required.

For example, Heil states that its PT1100 uses a 3.0 yd³ hopper. New Way lists hopper capacities from around 1 yd³ on its compact Diamondback to 3.55 yd³ on larger King Cobra models.

Hopper size should therefore be evaluated together with:

• body volume;
• loading height;
• hopper opening;
• cycle time;
• container lifting equipment;
• route waste type.

A large body with a poorly matched loading system may still slow the collection crew.

How to Choose the Right Rear Loader Capacity

There is no capacity that is correct for every municipality or waste contractor. Start with the route rather than the truck.

Estimate Waste Volume per Route

Review how much refuse is normally collected before the truck reaches a transfer station or disposal site.

If a vehicle repeatedly fills early, more usable body volume may reduce unloading trips.

If a large body returns partly empty every day, the fleet may be carrying unnecessary vehicle weight and operating a larger chassis than the route needs.

Check the Type of Waste

Volume alone is not enough.

Dry household waste, cardboard, wet organic waste and dense commercial refuse behave differently under compaction.

For heavier waste streams, payload and axle limits may become more important than maximum body volume.

Consider the Collection Area

Street width and route access can limit practical vehicle size.

Compact rear loaders may be easier to use in:

• old urban districts;
• narrow streets;
• parks;
• resorts;
• gated facilities;
• confined service areas.

Larger bodies are easier to justify where road access is suitable and the route produces enough waste.

Match the Body to the Chassis

The chassis must support the body itself, its equipment and the loaded refuse.

Review:

• GVW/GVWR;
• axle ratings;
• wheelbase;
• available frame length;
• weight distribution;
• local road limits.

Exact requirements vary by chassis, refuse body and market.

Review Route Productivity

A smaller truck may be easier to maneuver but require more disposal trips.

A larger truck may stay on the collection route longer, but it can cost more to operate and may not fit every collection point.

The correct capacity is the one that reduces avoidable trips without creating weight or access problems.

Rear Loader vs Other Garbage Truck Types

Capacity should also be considered together with the collection method.

CNSpecialVehicle's overview of garbage truck types and municipal applications covers the main differences between rear loaders, side loaders, front loaders and hook-lift vehicles.

Buyers comparing refuse compactors and other municipal equipment can also review the current sanitation truck listings on CNSpecialVehicle.

For a capacity-focused purchase, request the specification for the exact vehicle configuration rather than relying only on a general category description.

Reference Sources

1. Heil Environmental — Rear Load Garbage Trucks
2. Heil Environmental — PT1100 Rear Loader
3. Heil Environmental — Mini Rear Loader Specifications
4. New Way Trucks — Rear Loaders
5. CNSpecialVehicle — Sanitation Trucks
6. CNSpecialVehicle — Garbage Truck Types and Municipal Applications