Firestone R4Tech Air Suspension System
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Firestone Industrial Products Company’s R4Tech air suspension system is designed to replace the factory leaf spring suspension. Firestone’s R4Tech system delivers an improved ride at all times by utilizing the variable spring rate of the air spring to stiffen when the truck is loaded and soften when unloaded. The R4Tech hybrid air/leaf suspension system features a Firestone Airide air spring, Ride-Rite air accessories and a SANLUIS Rassini leaf-spring suspension to create a fully functional system that adjusts for varying load capacities. The complete R4Tech system comes with the Rassini foundation suspension – including leaf plates, lower trailing link, J-spring, spring perches and mounting brackets – the Airide air spring and an air compressor control system that maintains the proper air level in the spring for the exact load.
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