Take the new Quad Cab, for example, which features four independent, front-hinged, full-size doors. Anyone who has tried to squeeze into the back of an extended-cab truck while wearing bulky hunting gear or waders will appreciate those big rear doors. How did Dodge find extra cabin room without enlarging the truck overall? By squeezing the box down from six-foot-six to six-foot-three. That still leaves plenty of space for dog boxes and all your camping gear. If you haul longer cargo, like a motorcycle or an ATV, an eight-foot bed is also available.