State laws are the biggest factor governing use or non-use of auxiliary lift axles on trucks and trailers. Many states have patterned their weight limits after the federal Formula B law, which ...

SAF-Holland has introduced its latest trailer suspension, the ULX40 UltraLite slider with composite springs. The company says it’s the lightest tandem slider suspension available in North America.

When it comes to towing heavy loads, conventional wisdom states that more trailer axles are better. Just look at those specially built haulers that carry million-pound superloads—they have more axles ...