Önder Trailer presents our robust 4-axle Flatbed semi-trailers, engineered for transporting heavy and oversized loads with maximum safety and efficiency. Designed for durability and flexibility, these trailers are available in both standard and extendable configurations to meet diverse transport requirements.

Built with a high-strength chassis and premium components, our lowbeds offer exceptional load capacity, superior stability, and excellent maneuverability on various terrains. Whether you require a fixed length or an extendable platform to accommodate variable cargo sizes, Önder Trailer provides tailored solutions that deliver reliability and performance.

Ideal for construction equipment, machinery, and industrial transport, our 4-axle flatbed semi-trailers combine heavy-duty engineering with precise craftsmanship, ensuring your valuable cargo arrives safely and on time.

4-Axle Flatbed Semi-Trailer — Technical Specifications
Main Chassis

Manufactured from high-strength ST 52.3 steel with 10 mm thickness for body box and intermediate chassis support connections
Inner Box

ST 52.3 quality steel, 10 mm thickness

Loading Platform
Total length: 13,600 mm
Loading area length: 9,300 mm + 5,500 mm (extendable)
Platform width: 2,550 mm
Interim extension width: 500 mm (each side)
20 galvanized side expansion brackets (250 mm + 250 mm)
Platform sides covered with durable wood
Checker plate covering over tires and rear ramp for protection
16 forged steel swing-type tie-down points (Load capacity: 4,000 kg each)
6 central lashing rings for additional securing options

Loading Ramps
Box-type ramps made from ST 52 steel
Length: 2,700 mm + 1,100 mm
Width: 900 mm
Equipped with outward sliding folding legs

Axles
Brand: CEYLAN — 2 fixed axles, 2 steering axles
Front axle with electronic lift system (liftable first axle)
Each axle rated for 10-ton capacity
Forged steel axles welded with rectangular slip-on steel profiles via submerged arc welding
Hub-centered 10-bolt hubs with cooling system
Bearings: SKF quality (33213 outer, 218248 inner)
Brake system: 41x22 camshaft brakes

Suspension System
Air suspension compatible with 12-ton axle load
Air bellows conforming to standard 881 with level control valves

EBS System
Compact 4S2M WABCO brand system, fully EU standard compliant
Brake System

WABCO automatic load adjustment valve
WABCO load balancing distribution valve
4 x 30x30 spring brake chambers
4 x 24” service brake chambers
Equipped with brake booster trigger valve

Air System
Air supply for suspension, front axle lift, braking, and EBS via 2 air line filters and 3 air tanks
Uses polyamide brake pipes and specialized fittings

Slack Adjusters
Self-adjusting and automatic

Shock Absorbers
Installed to limit excessive axle movement for stability

Landing Gears
Double-circuit telescopic mechanical system by TEKNİKEL brand
Capacity: 25 tons

Kingpin
RELAX type, SAE standard, 2” diameter, model KZ 1012 H 50X
Made of forged steel (42 CrMo 4) with high resistance to tension and breakage
Bolted design for easy installation and removal

Electrical System
24V lighting compliant with EEC standards
SABA brand 7-function lights
7-pin electrical socket (24N/24S)

Tires and Rims
12 units STARMAXX tires
Size: 235–245 / 70 R17.5

Paint
First coat: 100 micron epoxy primer
Second coat: 100 micron primer
Final coat: Minimum 100 micron 2K acrylic paint

Tools and Accessories
1 plastic water tank
1 spare tire carrier
2 toolboxes
1 spare tire and hub cap wrench
2 wheel chocks
1 fire extinguisher cabinet
1 pressure gauge
1 12-ton winch

Contact Önder Trailer today for a tailored flatbed semi-trailer solution designed to meet your specific heavy transport needs.