OTR Tapered Roller Wheel Bearing Kit 3782/3720 from OTR is a complete cone-and-cup set engineered to restore wheel-end performance and eliminate progressive failure modes caused by worn bearings. This kit comprises the tapered inner cone and outer cup used at the wheel end to carry combined radial and axial loads, maintain correct bearing preload, and reduce friction that generates heat and accelerates wear. Dimensional specifications include a 1.7500" bore (cone ID), a 3.6718" cup outside diameter, and an overall set width near 1.1875", matching industry-standard inch-series tapered roller geometry. These engineered geometries and precision tolerances provide stable rolling contact and predictable load distribution across the roller complement, which helps maintain wheel-end spindle alignment and wheel speed under heavy-duty operating conditions. In fleet service, replacing worn cone-and-cup sets with a full kit addresses common operational problems such as increased wheel-end drag, elevated operating temperatures, and uneven roller wear that shorten service intervals. Installing a new set restores bearing clearance and preload parameters, reducing the frequency of wheel-end interventions and supporting more consistent preventive maintenance cycles. The kit is produced to heavy-vehicle bearing standards and is cross-referenced to widely used set numbers, which aids parts procurement and inventory consolidation. Packaged as a single unit, the kit simplifies parts staging for scheduled overhauls and unscheduled repairs, enabling faster turnaround during axle rebuilds. A manufacturer-backed warranty and adherence to industry quality practices help protect fleet uptime by ensuring replacement components meet established bearing performance characteristics. Use this OTR tapered roller kit when restoring wheel-end integrity to achieve measurable reductions in wheel-end temperature excursions and repeat service events associated with worn bearings.