F250 and up, max 60 square feet frontal area
I was shocked when this was pointed out to me today. According to Ford's owners manuals for the F250, F350, etc. there is a frontal area limitation. I'll quote from the 2013 manual, 3rd printing (I ...
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You will see these requirements mostly for smaller vehicles from many manufacturers. It's all about dynamic loads and ability to pull the grades. Mostly due to engine cooling limitations at high ambient temperatures.
