I'm thinking of getting a undercover tonneau and I was wondering if anyone knows how much if at these things effect mpgs.

 

"0" (none)

 

yeah, from the reading I've done on here and a couple of top secret NASA launch-coding technical brochures.... the covered bed thing has very little effect anymore. Same with lowered tailgate. The manufactuers have successfully engineered these babies in the front well enough that the disturbed air rolling over the cab doesn't grab enough bed / and or, even if covered, not enough difference.

Now, a complete topper, ( level with top of cab ) 'Might" give a little, but the offset with added weight and added crosswind effect would negate the added airstream, IMO.

I just bought a TonneuPro softie to keep pine needles and leaves out of my truck bed until I can park in the garage ( which I'm having to remodel so the truck will fit ). So I'd say for me, the only rationale was keeping crap out of the truck. Good luck, there are so many options... and if you hunt, you can find some good deals too... including tips on this forum.

 

Correct! None zero nodda..lol check out extang tuff tonneau... Very nice

 

Hasn't affected my MPG. Keeps snow and crap out of the bed and dresses up the truck. Love my Truxedo cover

 

Thanks for the info guys I'm in the shop ordering it right now. MNFord your truck looks good