About Femmerr
Heavy haulage, engineered.
We design and build lowbed and extendable semi-trailers for the heaviest industrial cargo on earth, from wind turbine blades and transformers to excavators, cranes, and oversized plant machinery.
15+
Years of expertise
100+
Ton payload capacity
8
Axle configurations
30+
Countries served
Our story
Purpose-built for the hardest loads.
Femmerr is a dedicated manufacturer of heavy-duty lowbed and extendable semi-trailers. Every unit leaving our factory is engineered for professional heavy haulage, wind energy logistics, infrastructure projects, mining, construction equipment, and oversized industrial transport.
We are a brand of STU Trailers, an established industrial group with more than 15 years of expertise in special-purpose trailer design and manufacturing. That heritage lives in every weld, every hydraulic circuit, and every axle configuration we produce.
Our promise is simple: a trailer that performs under the hardest operating conditions, season after season, with the engineering support to back it up, anywhere in the world.
What sets us apart
Four principles behind every trailer we ship.
Engineering first
Every trailer is built around the load. Multi-axle steering, proportional hydraulics, and modular decks engineered to the exact duty cycle.
Built to last
S355J2+N structural steel and Strenx 700E high-tensile grades, precision-welded under controlled factory conditions for long service life.
Vertically integrated
Laser cutting, CNC machining, robotic welding, surface treatment, and final assembly, all under one roof in Turkey.
Global heavy haulage
Delivering to professional fleets across Europe, the Middle East, Africa, and Central Asia. EC Type Approval and ADR compliant.
Materials
S355J2+N and Strenx 700E
High-strength structural steel, reducing trailer weight by up to 30% while holding maximum load-bearing integrity.
Production
One factory, full control
Laser cutting, CNC machining, robotic welding, surface treatment, and final assembly, all under one roof in Turkey.
Part of STU Trailers
Femmerr is a brand of STU Trailers, 15+ years of special-purpose trailer engineering.
A shared engineering platform, a unified supply chain, and a single standard for quality across the group.
Visit stutrailer.com
Let’s build yours.
Tell us about the load, the route, and the duty cycle. Our engineering team will configure the right trailer for the job.