OTR Premium Low Arch Trailer Leaf Spring 3-Leaf 3" Width 21.25"/22.4375" Free Arch ~3.37" 11,200 lb Capacity. This OTR Premium low-arch trailer leaf spring is engineered as a direct-fit replacement for common Hutchens, Binkley and Cush trailer suspensions where a 3-leaf, low-arch spring is specified. Designed to restore rated spring capacity and suspension geometry, the part returns the axle and trailer to the intended ride height and load-bearing profile, addressing sagging, uneven loading and reduced axle capacity that cause accelerated tire and chassis wear. The springs rated capacity at the pad is 11,200 lb (pack capacity and axle load depend on suspension configuration), with a three-leaf 3/788 construction and a measured free arch in the low-arch class. Key dimensions include 3.00" width, long-end length along the leaf surface of approximately 22.4375" and short-end length along the leaf surface of approximately 21.25", making it a direct replacement where those dimensions and mounting styles are used. Field benefits for fleet operations include re-establishment of designed load distribution for tandem and triaxle trailer assemblies, predictable spring rate recovery for measured axle load management, and reduced maintenance cycles associated with compensating for worn or flattened springs. As a replacement component offered through a mainstream heavy-duty parts channel, the spring is supplied to match fit-and-function expectations of OEM-style trailer suspension systems, enabling faster service bay turn times and consistent fleet uptime when used as part of scheduled or corrective suspension maintenance. Installation practice of replacing springs in matched sets and following suspension manufacturer torque and alignment procedures will preserve the measurable load and ride characteristics the spring restores.