We have a Dodge Ram 1500 Quad Cab with four Yakima Bedheads. Gas mileage isn't great but the truck doesn't have many miles. Last one my husband had (totalled it) was getting 22 mpg highway once it hit 50k. Right now we get about 18 mpg highway, except when we went to New Mexico and got 22 mpg the whole 2,000 mile trip with 4 bikes in the bed. One bike fits behind the seat nicely so I can bring mine to work.I am a big fan of our truck.
Amanda
2011 Specialized Epic Comp 29er | Specialized Phenom | "Marie Laveau"
2007 Cannondale Synapse Carbon Road | Selle Italia Lady Gel Flow | "Miranda"
You don't have to be great to get started, but you do have to get started to be great. -Lee J. Colan
How 'bout any car you want for daily use and a trailer? I pull one of these with my MINI (Class 2 hitch, don't even need a big hitch for it)
http://www.hdtrailer.fix.net/
Yakima just bought this equivalent trailer last year
http://www.yakima.com/productcategory.aspx?id=52
On the sportsrig we can get, 2 velomobiles or 3 trikes or a combo of trikes/bikes. I would guess 4 bikes wouldn't be a problem.
The gas mileage difference on my friends car is ~28 mpg to ~27 mpg on his highway trips. I've only used mine short distances so can't tell you any difference in the MINI.
My photoblog
http://dragons-fly-peacefully.blogspot.com/
Bacchetta Giro (recumbent commuter)
Bacchetta Corsa (recumbent "fast" bike)
Greespeed X3 (recumbent "just for fun" trike)
Strada Velomobile
I will never buy another bike!
My "Fast" cannot bear he thought of putting a hitch on the back of my GTI.
My photoblog
http://dragons-fly-peacefully.blogspot.com/
Bacchetta Giro (recumbent commuter)
Bacchetta Corsa (recumbent "fast" bike)
Greespeed X3 (recumbent "just for fun" trike)
Strada Velomobile
I will never buy another bike!