The Transtex EDGE TOPKIT+ installs on the back of trailers to optimize rear-end aerodynamics and reduce drag without the need for driver interaction. One of the lightest rear aero solutions available, the EDGE TOPKIT+ combines with EDGE FLAPS to provide fleets with 4.44% in fuel savings as tested with Mesilla Valley Transportation Solutions.The simple design calls for minimal parts with virtually no maintenance or downtime, and are suitable for all trailer applications, including those with corrugated walls, roll-up doors, and lift gates.