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Old 11-22-2011, 03:17 PM   #14 (permalink)
spacer
mostly harmless
 
Join Date: Oct 2009
Location: Central AR
Posts: 77

Herman - '06 Chevrolet HHR 2LT
90 day: 28.89 mpg (US)
Thanks: 19
Thanked 5 Times in 5 Posts
Tailgate down creates a lot of drag, as the air is striking downward on the tailgate that far back. Removing the tailgate helps, but the rear-tonneau cover option is what I understand creates the best truck bed aero solution.
If I get to keep Earl (please please please... I may have to sell him to cover the HHR's down payment) I really want to play with some ideas.
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