Looks like a clever system with significant savings: http://smarttruckbrands.com/undertray.php
Cost - How much? How long does it take to earn back its cost in fuel savings and then truly be beneficial.
Claims about drag factor -It's just a target, it says nothing about meeting those claims.
Can't find any info besides skimpy website. Anything else out there is just a copy of a small press release. Wouldn't want to be someone elses guinea pig.
Good idea though, but skeptical without any real results to look at.
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How am I supposed to drive under the trailer during crazy car chases if they start putting those on?
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I am skeptical of the durablilty of the "rain gutter" and the side fairings don't make any sense. Does the driver (or spotter lol ) have to R&R everytime he makes a stop? That will never happen. Many truckers don't even wear proper shoes.
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the slipper skirts really do make a big difference in fuel economy. However they are bought mostly by large fleet operators, and almost never the small fleet or owner/operators. I think this undertray system might actually work well. Only time will tell however. I have enough problems everyday trying to explain why truckers need things like working lights.