The TrailerTail rear fairings use an aerodynamic design and ultra-light thermoplastic composite materials to reduce rear drag. The fairings use a collapsible origami architecture for convenience. According to a third-party test, the trailer can offer fuel savings of more than 6 percent, the company says. The fairings come with a 90-day risk-free offer.
Affected trucks include model year 2008-2018 Freightliner Cascadia and Western Star 4700, 4900, 5700 and 6900 trucks. DTNA says after hard brake applications, the brake light pressure switch may not activate the brake lights with the light application of the brake pedal.