OTR Heavy Duty Shock Absorber for Cush / Ridewell Suspensions is engineered to restore and maintain controlled damping on Class 6“8 vehicles equipped with air spring and taperleaf suspensions. Designed for heavy vocational and fleet use, this shock uses a nitrogen gas charge and tuned valving to deliver fast response and sustained tiretoroad contact under load, which helps reduce wheel hop and improves vehicle stability during braking, acceleration, and lane changes. A larger bore and reserve tube provide more consistent hydraulic control and thermal capacity, while contained oil additives help limit fluid degradation in extreme temperatures to preserve damping performance over long service intervals. The rod and bearing arrangement reduces abrasion at the rod guide and, combined with a reinforced piston rod, is intended to extend service life in severe duty cycles. The unit also includes features to protect the seal assembly and prevent airbag overextension, addressing common failure modes that lead to premature downtime. Specified for direct replacement on Cush and Ridewell suspension applications, this shock is offered with a 2year/200,000mile limited warranty to provide measurable coverage for highmileage fleet operations. By restoring predictable damping characteristics and resisting oil breakdown, the product supports more consistent tire contact patches and suspension control, which can translate to steadier handling, reduced rolling instability, and lower maintenance frequency compared with degraded shocks. The design focuses on durability and repeatable performance so fleet technicians can complete repairs with a single, purposebuilt replacement that matches the operating demands of heavy trucks, buses, and trailers fitted with Cush or Ridewell suspension systems.