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Old May 14th, 2017, 03:58 AM   #1
Aufgeblassen's Avatar
Joined: Jul 2013
From: Central FL
Posts: 11,566

Tractor-Trailer Undertrays Improve Aerodynamics

Ever wonder what those strange objects under tractor-trailers are?

I thought they were some kind of chute!

But they are really for improving aerodynamics and increasing MPG.

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aerodynamics , improve , tractortrailer , undertrays

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