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Lowboy / Lowbed Trailer for Heavy Machinery Transport: Specs, Configurations & Pricing

July 19, 2026

Lowboy (lowbed) trailers are essential for transporting excavators, bulldozers, mining trucks, and oversized cargo. Complete guide to configurations, hydraulic ramps, gooseneck design, and FOB pricing.

When you need to move a 30-ton excavator, a 50-ton bulldozer, or a 100-ton transformer, no standard flatbed will do. You need a lowboy trailer (also called lowbed or low-loader) – the specialized equipment transporter designed specifically for heavy and oversized cargo.

Lowbed semi trailer with hydraulic ramps for heavy machinery transport

What is a Lowboy Trailer?

A lowboy trailer is characterized by:

Lower deck height (typically 800-1300mm vs 1500-1600mm for flatbed)
Gooseneck front section (allowing taller cargo clearance above the tractor)
Hydraulic or mechanical loading ramps at the rear
Concentrated axle loadings (often multiple closely-spaced axles)

The lower deck height allows taller cargo to be transported within standard road height limits, while the gooseneck design lets the cargo ride over the tractor’s fifth wheel area.

Common Applications

Lowboy trailers are used for transporting:

Construction equipment: excavators, bulldozers, wheel loaders, backhoes
Road construction equipment: pavers, rollers, milling machines, asphalt plants
Mining equipment: haul trucks, drilling rigs, processing equipment
Agricultural equipment: large tractors, combine harvesters
Industrial equipment: generators, compressors, transformers
Military equipment: tanks, APCs, artillery
Construction elements: prefabricated building sections, bridge girders
Cranes: mobile and crawler crane components

Standard Configurations

2-Axle Lowboy

For lighter equipment transport:

Payload: 20-40 tons
Deck height: 850-1000mm
Typical cargo: Small excavators (CAT 320 class), mini loaders, small bulldozers
FOB price: $10,000-15,000

3-Axle Lowboy (Most Common)

The workhorse configuration:

Payload: 40-60 tons
Deck height: 900-1100mm
Typical cargo: Mid-size excavators (CAT 330 class), bulldozers (CAT D6 class), mid-size wheel loaders
FOB price: $15,000-22,000

4-Axle Lowboy (Heavy-Duty)

For large construction and mining equipment:

Payload: 60-80 tons
Deck height: 1000-1200mm
Typical cargo: Large excavators (CAT 345/374 class), large bulldozers, mining trucks (rigid frame disassembly)
FOB price: $22,000-30,000

Multi-Axle Heavy Lowboy

For very heavy equipment:

Payload: 80-100+ tons
Deck height: 1100-1300mm
Typical cargo: Mining trucks, large transformers, oversized construction equipment
FOB price: $30,000-50,000

Critical Specifications

Main Beam

The main beam takes exceptional stress during loading and transport:

Steel grade: Q345B or T700
Height: 500-550mm (heavier than standard trailers)
Thickness: Top 14-16mm, Bottom 16-20mm, Middle 8-10mm
Welds: Full penetration, 100% X-ray tested on critical seams

Gooseneck Design

The gooseneck is what allows lowboys to carry tall equipment:

Fixed Gooseneck

Standard for most lowboys. Lower cost but limits cargo length to the main deck area. Suitable for excavators, bulldozers, and most construction equipment.

Detachable Gooseneck (Hydraulic)

The gooseneck can be hydraulically detached from the main deck, allowing:

Loading of extremely tall or long cargo (cranes, tanks)
Loading from the front (instead of just the rear)
Higher payload (no gooseneck weight)
Premium feature, adds $8,000-15,000 to the price

Mechanical Detachable Gooseneck

Lower-cost version of detachable gooseneck using manual or mechanical jacks. Slower operation but more reliable than hydraulic.

Ramps

Ramps are critical for self-loading equipment:

Mechanical Spring Ramps

Lower cost
Spring-assisted lifting
Suitable for lighter equipment (under 30 tons)

Hydraulic Ramps

Hydraulic cylinder operation
Smoother control
Better for heavy equipment (30+ tons)
More expensive but faster operation

Fold-Down Ramps

Single piece, folds flat for transport
Quick deployment
Mid-cost option

Axle Configurations and Brands

Lowboy axles are typically:

Axle Brands

BPW (Germany) – Premium, global parts availability
FUWA (China) – Mid-tier, reliable
SAF-Holland (Germany) – Premium for heavy-haulage

Axle Spacing

Tandem axle spacing affects load distribution:

Standard tandem spacing: 1310-1360mm
Spread axle spacing: 1810-1860mm (better for off-road and poor roads)

Suspension

Mechanical (leaf spring): Standard, lower cost
Air suspension: Better for high-speed highway, cargo protection
Hydraulic suspension: For very heavy loads, adjustable height

Tires and Capacity

Tire Configurations

Single tires: Standard for most configurations
Dual tires: Higher payload capacity, more stable but higher cost
Super-single tires: Premium option for high-speed and weight-sensitive operations

Tire Brands

Standard: Triangle, Linglong, DoubleCoin (Chinese)
Mid-tier: Hankook, Kumho (Korean)
Premium: Michelin, Bridgestone, Continental (high-speed, long-distance)

FOB Price Ranges (2026 Reference)

Spec Level	3-Axle Fixed Gooseneck	3-Axle Detachable Gooseneck	4-Axle Heavy-Duty
Economy	$14,000-17,000	$20,000-24,000	$22,000-26,000
Standard (BPW 13T, mechanical ramps)	$17,000-22,000	$24,000-30,000	$26,000-32,000
Premium (BPW 16T, hydraulic ramps, air suspension)	$22,000-28,000	$30,000-38,000	$32,000-40,000

Special Considerations

Regulatory Limits by Country

Different countries have specific rules for heavy equipment transport:

Weight Limits

Most countries: 40-56 ton GVW for standard tractor + lowboy
Special permits required for over-weight transport
Multi-axle configurations required above 80 tons in most jurisdictions

Dimension Limits

Width: typically 2.5-2.6m maximum without special permit
Length: typically 18-22m maximum for tractor + lowboy combination
Height: typically 4.0-4.5m maximum without special permit

Loading and Unloading Considerations

Self-loading equipment: Most excavators and bulldozers can self-load via ramps
Non-self-loading equipment: Requires separate crane or loader
Detachable gooseneck: Allows front-loading for very long cargo
Loading dock height: Some equipment requires a specific deck-to-ground height

Choosing Between Fixed vs Detachable Gooseneck

Choose Fixed Gooseneck When:

Standard construction equipment (excavators, bulldozers)
Payload under 60 tons
Standard rear-loading only
Lower budget priority

Choose Detachable Gooseneck When:

Transporting tall equipment (cranes, tanks)
Need to load from the front
Maximum payload required
Frequent loading/unloading cycles

Maintenance Considerations

Lowboy trailers experience higher stress than standard trailers:

Higher Wear Items

Ramp hinges and latches: Daily use, replace every 2-3 years
Gooseneck pivot pin: Inspect annually, replace every 5 years
Tie-down points: Frequent use, inspect weekly
Suspension bushings: Inspect annually due to heavy loads

Structural Inspection

Annual visual inspection of all welds, especially:

Gooseneck-to-deck connection
Deck-to-frame welds
Suspension mounting points
Ramp attachment points

Conclusion

For most construction and mining equipment transport operations, a 3-axle lowboy with fixed gooseneck offers the best combination of payload, maneuverability, and cost. Choose detachable gooseneck only for specialized operations requiring taller cargo or front-loading capability.

Need help selecting the right lowboy for your heavy equipment transport operation? Contact our engineering team with your typical cargo type, weight, and operating conditions – we’ll recommend the optimal specification.