Typical examples of customized designs are the lightweight trailers built for the Specialized bicycle group and Bishops School.
For Specialized a trailer was designed which could carry 13 bicycles plus marketing equipment with a laden mass below 750 kg.
For Bishops a trailer was designed which carries 28 bicycles plus riding helmets, water and cycling gear. Special racks were developed to accommodate the cycles at the most optimised position and orientation. This trailer also works for long distances on off-road conditions.