Dolly Trailers in Adelaide

A dolly trailer (also called a converter dolly) is a short auxiliary trailer unit used to connect a prime mover to additional semi-trailers in B-double, A-double, or road train configurations. Dollies feature a coupling mechanism at the front (tow eye or kingpin) that connects to the rear of the lead trailer, and a turntable at the rear that accepts the kingpin of the following trailer. This allows operators to convert single semi-trailer combinations into multi-trailer configurations, significantly increasing payload capacity per trip. Dollies are essential equipment for long-haul freight operations, enabling efficient bulk haulage across Australia's interstate routes.

AAA Trailers supplies dolly trailers for sale in Adelaide in three main configurations:

Tandem Axle Converter Dolly:

• Two axles for standard B-double and road train work
• Lighter tare weight (~3.1T) for better payload
• Compact 5.6m length with 2.7m A-frame
• Cost-effective solution for general haulage

Tri Axle Converter Dolly:

• Three axles for superior weight distribution
• Heavier construction (~4.5T tare) for demanding work
• 6.4m length with 2.2m A-frame
• Better for heavy or high-volume freight

Tandem Axle Load Share Dolly:

• Two axles with airbag suspension (standard, not optional)
• Advanced load distribution technology
• 6.4m length, ~4.5T tare
• Premium option for smooth ride quality

All models share 18T ATM and GTM ratings with K-Hitch running gear and full LED lighting.

Converter Dollies:

• General-purpose dolly for B-double and road train use
• Spring suspension standard (air optional)
• 50mm SAF tow eye coupling
• Standard weight distribution
• Lower initial cost

Load Share Dolly:

• Airbag suspension standard for superior load distribution
• Dual-position kingpin instead of tow eye
• Advanced weight transfer between units
• Smoother ride quality
• Better for premium freight or sensitive loads

Both serve the same fundamental purpose, but load share dollies offer enhanced performance for operators prioritising ride quality and load distribution.

Tandem Axle (2 axles):

• Lighter tare weight (~3.1T)
• Better payload capacity
• More manoeuvrable in tight spaces
• Lower tyre and maintenance costs
• Suitable for most B-double work

Tri Axle (3 axles):

• Superior weight distribution (~4.5T tare)
• Spreads load across more tyres
• Reduced individual tyre wear
• Better stability under heavy loads
• Preferred for road train configurations

Adelaide operators choose based on typical loads, routes, and whether they're running B-doubles or full road trains.

Dolly trailers for sale in Adelaide enable multi-trailer configurations for:

• B-double operations (one dolly between two trailers)
• A-double configurations
• Road train setups (multiple dollies and trailers)
• Long-haul freight maximising payload per trip
• Bulk haulage of grain, minerals, general freight
• Interstate linehaul operations
• Regional distribution with high-volume loads

They're essential for operators wanting to increase freight capacity without running multiple separate truck combinations, improving efficiency and reducing per-tonne transport costs.

With 18T ATM and GTM ratings:

• Tandem Axle Converter: ~3.1T tare = ~14.9T payload
• Tri Axle Converter: ~4.5T tare = ~13.5T payload
• Tandem Axle Load Share: ~4.5T tare = ~13.5T payload

The tandem converter offers the best payload due to its lighter construction. However, payload isn't the only consideration—weight distribution, ride quality, and stability under load are equally important in dolly selection.

Tandem Axle Converter Dolly:

• FUWA FW520 8-leaf spring (standard)
• Air suspension (optional upgrade)

Tri Axle Converter Dolly:

• Tri-axle spring suspension (standard)
• Air suspension (optional upgrade)

Tandem Axle Load Share Dolly:

• Tri-axle airbag suspension (standard, not optional)

Adelaide operators in bulk haulage typically choose spring for durability; those running premium freight or seeking maximum comfort opt for airbag suspension.

Converter Dollies (Tandem & Tri):

• 50mm SAF tow eye at front
• Connects to rear coupling on lead trailer
• K-Hitch 50mm bolt-in turntable at rear (90mm optional)
• Accepts kingpin from following trailer

Load Share Dolly:

• Dual-position 50mm bolt-in kingpin at front (90mm optional)
• Connects to fifth wheel on lead trailer
• K-Hitch 50mm bolt-in turntable at rear (90mm optional)
• Different coupling method for load transfer

The coupling system affects how weight transfers through the combination and which trailer types you can connect.

Standard inclusions across all AAA dolly models:

• K-Hitch 22.5" drum brake axles
• Front coupling (SAF tow eye or dual-position kingpin, model dependent)
• K-Hitch 50mm bolt-in turntable (90mm optional)
• Suspension (spring or airbag, model dependent)
• Full LED lighting package
• 10/285 PCD dual steel rims (aluminium optional)
• 11R22.5 or 255/70R22.5 tyres (model dependent)
• Heavy-duty chassis construction

The specific A-frame length and overall dimensions vary by model.

Available optional upgrades include:

• Road train kit (converter dollies only)
• Hub odometer for tracking and maintenance
• Spare wheels (steel or alloy)
• Aluminium wheels (upgrade from steel rims)
• 90mm turntable upgrade
• Air suspension upgrade (converter dollies)
• EBS multi-volt 12/24V brake kit (optional on all models)

Our Adelaide team at 10 Millers Road, Wingfield can help you select options based on your typical configurations and routes.

Yes. Both converter dolly models (tandem and tri-axle) can be fitted with optional road train kits for multi-trailer combinations. Road trains typically use:

• One dolly for B-doubles (prime mover + dolly + 2 trailers)
• Two dollies for standard road trains (prime mover + 2 dollies + 3 trailers)
• Multiple dollies for extended road train configurations

This makes them essential for Adelaide operators running freight to remote SA regions, interstate routes, or mining operations where maximum payload per trip drives profitability.

Tandem Axle Converter:

• Length: 5.6m
• A-frame: 2.7m
• Two axles

Tri Axle Converter:

• Length: 6.4m
• A-frame: 2.2m
• Three axles

Tandem Axle Load Share:

• Length: 6.4m
• A-frame: Not specified
• Two axles

The A-frame length affects the overall combination length and turning characteristics of your B-double or road train setup.

Consider your typical work:

• Tandem Converter: Standard B-double work, maximum payload priority, general freight
• Tri Converter: Heavy road train work, superior stability, bulk haulage
• Load Share: Premium freight, smooth ride quality, sensitive loads

Then decide whether standard spring suspension meets your needs or if airbag suspension justifies the investment.

Absolutely. Dollies are essential for B-double configurations, which are one of Australia's most common multi-trailer setups. A B-double consists of:

• Prime mover
• Lead semi-trailer
• Converter dolly
• Second semi-trailer

This configuration is popular for Adelaide metro to interstate freight, offering nearly double the capacity of a single semi-trailer while maintaining reasonable manoeuvrability compared to full road trains.

All AAA dolly trailers feature:

• K-Hitch 22.5" drum brake axles
• EBS multi-volt 12/24V brake kit (optional)
• Air brake integration with prime mover and trailer combination
• Full LED lighting for visibility

The optional EBS (Electronic Braking System) provides advanced brake management, improving safety and control across the entire multi-trailer combination.

While dollies can be ordered with airbag suspension as a factory option (or come standard on the load share model), retrofitting suspension after purchase is typically not cost-effective. It's better to select your preferred suspension type at the time of purchase based on your operational requirements and budget.

Dollies serve operators across multiple sectors:

• Long-haul freight: Interstate general freight and logistics
• Bulk haulage: Grain, minerals, aggregates in road trains
• Food distribution: Supermarket and wholesale supply chains
• Manufacturing: Raw materials and finished goods transport
• Mining: Equipment and materials to remote sites
• Agriculture: Farm products to processing or export
• Construction: Building materials in high volumes

Any Adelaide operation benefiting from increased payload capacity per trip uses dollies to improve efficiency and reduce per-tonne transport costs.

Yes. All AAA dolly trailers are manufactured to comply with Australian Design Rules (ADR) and Heavy Vehicle National Law (HVNL) requirements. They're suitable for operation across all Australian states and territories in approved B-double, A-double, and road train configurations, subject to relevant permits and route approvals.

Every AAA dolly trailer is backed by our comprehensive 12-month warranty covering defects and faulty workmanship under normal use and maintenance. During the warranty period, AAA Trailers will repair or replace any defective products or parts at no cost to you.

The dual-position kingpin coupling on the load share dolly (versus a tow eye on converter dollies) provides:

• Different weight transfer characteristics
• Compatibility with specific trailer types
• Alternative connection method to fifth wheel
• Flexibility in multi-trailer configurations
• Advanced load distribution through the combination

The choice between tow eye and kingpin coupling depends on your specific trailer fleet and desired configuration setup.

Getting a quote is straightforward:

• Call our Adelaide team on 1300 333 888
• Visit us at 10 Millers Road, Wingfield SA 5013
• Complete the "Get A Quote" form on our website

Our team will discuss whether you're running B-doubles or road trains, your typical loads, whether you need tandem or tri-axle configuration, and suspension preferences to recommend the right dolly for your multi-trailer operation.