OTR 16.5" x 7" Brake Drum by OTR is a heavy-duty cast brake drum engineered for medium- and heavy-duty fleet braking systems. Sized for 16.5 in diameter with a 7 in brake shoe width and an 8.78 in pilot, this drum is precision-machined and balanced to deliver consistent contact with brake shoes and smooth rotational performance. The unit weight (listed around 112“113 lb in supplier specifications) and uniform casting contribute to stable thermal mass and predictable heat dissipation under repeated braking cycles. Precision machining of the mounting and braking surfaces reduces runout and helps maintain even shoe-to-drum contact, which supports repeatable stopping distance and lowers the frequency of corrective machining or early replacement.