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 ...

Spread tandems - the widely spaced axle configurations found mostly on flatbeds, car haulers and refrigerated trailers - exist for good reasons, all related to weight. Under various weight laws, ...

Powered trailer axles are unusual, even in Europe where they do things differently with trucks than what we do here in North America. That’s why a new product from SAF-Holland, a hydraulically driven ...

You can’t drive a trailer, but the Hyliion hybrid electric tandem can help propel your rig down the road. From the driver’s seat, you feel nudging from the powered trailer behind. Its primary purpose ...

[Stay on top of transportation news: Get TTNews in your inbox.] When it comes to spec’ing, getting the best fuel economy is about building a tractor with all the right pieces. Even with the best basic ...