The Wirth WR aerodynamic dome kit is a front-mounted fairing designed for box double deck trailers with rigid sides. It is intended for taller trailer configurations between 4.6m and 4.9m in height, where aerodynamic drag can significantly affect fuel consumption.
The system works by smoothing airflow over the front bulkhead and roof transition, reducing turbulence created by the increased frontal area of taller trailers. This helps improve aerodynamic efficiency, particularly at sustained road speeds.
- Delivers 14% less aerodynamic drag than an un-kitted 4.9m tall trailer
- Gives a fuel saving of 7% at a constant 55mph under test conditions
- Delivers a typical return on investment in less than 12 months
The stated performance figures are based on controlled test conditions, including steady-speed operation at 55mph. Actual in-service results will vary depending on route profile, loading, traffic conditions and driving behaviour.
The dome kit is intended for use on rigid-sided box double deck trailers operating at heights between 4.6m and 4.9m. It is most effective on higher-speed routes where aerodynamic drag is a dominant factor in fuel consumption, allowing efficiency gains to accumulate over time.
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Royal Mail Trailer Aero Dome
