16L series bearings utilize a single-row four-point contact ball arrangement, with each ball contacting the raceways at four distinct points. This geometry enables the bearing to simultaneously support axial loads in both directions, radial loads, and tilting moments within a single, compact row of rolling elements.

The defining characteristic of the 16L series is its heavy-duty reinforced construction. The rings feature an enlarged cross-section and increased material thickness compared to standard series, providing exceptional structural strength and resistance to deformation under heavy loads. This robust design makes the series particularly suitable for applications involving high static loads, shock loading from rough terrain, and extended service life requirements.

The bearings are equipped with integral mounting holes on both the inner and outer rings, enabling direct bolted attachment to the trailer chassis and the towing structure. The mounting hole pattern is designed to distribute loads evenly across the bearing, minimizing stress concentrations and ensuring reliable performance. The bearings are typically supplied with heavy-duty seals on both sides to prevent contamination from dirt, water, and debris commonly encountered in outdoor towing environments.