The Dana Spicer D172 Series Heavy Duty Tandem Axle is designed for construction, heavy haul, and severe service applications. The D172 is more than 60 lbs lighter than the company's existing D170 series tandem axles and offers a broad range of gear ratios, from 3.07 to 6.14, to serve a variety of needs. Wide-face, High-Power Density AdvanTEK gearing is designed to maximize strength while reducing weight. A reliable, passive lube management system requires less lube while using a patented meter to optimize the amount of lube flow to the high-efficiency bearings, according to the company.