Have you ever wondered why some semi trucks have one set of wheels and others have two sets crammed together? That's because some semis use a single axle while others have tandem axles, but why is it ...

What works in one state or area of the country will probably not work in another. Each state has peculiar weight laws that in effect define a truck's design, and most trucks operating there will ...

Pusher axles and the "flying tag" on this mixer truck are raised for crawling through deep sand in eastern Minnesota. While on the road, the lift axles are lowered to spread the truck's weight, ...

Dump vehicles come in a dizzying array of configurations - standard dump truck, Superdump, transfer dump truck, truck and pup, tractor with end dump trailer, tractor with side dump trailer, tractor ...