OTR Premium Low Arch Tapered Trailer Leaf Spring 3-Leaf 12,000 lb Capacity 3.00" Width 21.5"/22.75" Length. This replacement trailer leaf spring is engineered to restore designed suspension capacity and ride height for trailers that use low-arch, tapered three-leaf packs. Built to meet common OEM and aftermarket specifications for Binkley, Cush and Hutch-style trailer suspensions, the unit provides a rated spring capacity of 12,000 lb at the pad and a low arch profile that preserves factory axle-to-frame geometry. Key measured attributes include a long-end length along the leaf surface of 22.75", a short-end length of 21.50" and a pack arch around 3.25", with a 3.00" spring width and pack thickness in the neighborhood of 2.93". Because it is offered as a direct-fit replacement for established OEM references, installation restores load-carrying capability without the need for axle or suspension rework. For fleet operations, that translates into predictable load capacity, consistent trailer height for coupling and loading, and faster turnarounds on suspension repairs. The low-arch tapered design balances flex and control to maintain lateral stability under load while minimizing unnecessary articulation that can accelerate hanger, shackle, or pad wear. The spring is produced to industry spring construction standards for trailer applications and is sold individually to give technicians the flexibility to replace only damaged units or to replace in matched pairs when shop practice requires. A standard parts warranty applies. Use this leaf spring where the vehicle maintenance plan calls for restoring original spring arc class, rated capacity, and basic spring geometry to bring trailers back into service with verified load ratings and predictable suspension behavior.