Because dually trucks are so big, they may not be able to navigate smaller, private roads or park in standard spots. More wheels on the rear axle also means more wheels you have to care for or ...

When it comes to the biggest trucks on our roads—the Class 8 trucks that can pull up to 80,000 lbs (36.2 tonnes)—there's a lot of room for improvement, which is where Super Truck II comes in.

Toyota is developing and producing a hydrogen fuel cell powertrain for big trucks. ... of undisclosed origin before traveling to the drive axle at the rear. ... the truck felt, well, like a big rig.

It's not quite a big-rig truck, ... While dually trucks have the usual two wheels on a standard front axle, the rear axle has four wheels, with two pairs sandwiched together on both sides.