OTR 16.5" x 8" Balanced Outboard Mount Brake Drum. This OTR outboard-mount brake drum is engineered to restore braking stability and predictable stopping performance in commercial truck and trailer rear-axle applications. Designed as a balanced, outboard-mounted unit with an 8.00" brake shoe width, the drum addresses operational problems that directly affect fleet uptime: vibration-induced accelerated component wear, uneven shoe contact, and heat buildup that leads to brake fade. The drums balanced construction reduces rotational vibration at highway and yard speeds, producing smoother wheel rotation that lowers cyclic loading on bearings, hubs, and brake hardware. Measured attributes include a pilot diameter of approximately 8.78" and a nominal assembled weight near 119 lb for the 8" width configuration, which supports correct fitment and predictable inertia characteristics when replacing worn or damaged drums. The drums design emphasizes heat dissipation and dimensional stability under repeated service cycles, helping maintain even shoe contact and limiting rapid brake lining wear. For fleet maintenance operations, that translates into longer service intervals for shoes and hardware, fewer out-of-service events for brake-related failures, and more consistent braking torque across an axle set”factors that simplify preventive maintenance planning and parts stocking strategies. The product is produced and finished to industry machining and balancing standards applicable to outboard-mount drums, enabling direct replacement on common 16.5" brake systems where an outboard-mounted, balanced drum is required. Installation follows standard outboard drum procedures and uses existing hub and mounting interfaces; technicians report straightforward swap times when replacing damaged or oversized drums. Overall, this OTR 16.5" x 8" balanced outboard drum delivers a measurable reduction in vibration and improved thermal behavior compared with unbalanced or damaged drums, yielding longer component life and more predictable braking performance across fleet duty cycles.